# API reference Source: https://libtmux.org/en/perl/latest/reference/ > Types, methods, and functions in libtmux for Perl. Browse the Perl types and operations for working with tmux. Start with the core objects below, or search for a type or member. Server 1 type [Server](https://libtmux.org/en/perl/latest/reference/libtmux-server/) class In LibTmux 43 members Explicit tmux acquisition and commands Session 1 type [Session](https://libtmux.org/en/perl/latest/reference/libtmux-session/) class 11 members Captured session entity Window 2 types [Window](https://libtmux.org/en/perl/latest/reference/libtmux-window/) class 13 members Captured window entity [WindowLink](https://libtmux.org/en/perl/latest/reference/libtmux-windowlink/) class 10 members Captured window_link entity Pane 1 type [Pane](https://libtmux.org/en/perl/latest/reference/libtmux-pane/) class 18 members Captured pane entity Client 1 type [Client](https://libtmux.org/en/perl/latest/reference/libtmux-client/) class 12 members Captured client entity Commands 3 types [Operation](https://libtmux.org/en/perl/latest/reference/libtmux-operation/) class 6 members Executor-independent prepared command continuations [ProcessJob](https://libtmux.org/en/perl/latest/reference/libtmux-processjob/) class 8 members Shared owned process-supervision boundary [Transport](https://libtmux.org/en/perl/latest/reference/libtmux-transport/) class In LibTmux 2 members Supervised literal process execution Queries 10 types [ClientSelection](https://libtmux.org/en/perl/latest/reference/libtmux-clientselection/) class 10 members Native array selection of captured client entities [Filter](https://libtmux.org/en/perl/latest/reference/libtmux-filter/) class 9 members Validated, reusable local criteria and explicit wire data [PaneSelection](https://libtmux.org/en/perl/latest/reference/libtmux-paneselection/) class 10 members Native array selection of captured pane entities [QueryPlan](https://libtmux.org/en/perl/latest/reference/libtmux-queryplan/) class 4 members Explainable explicit pane acquisition [Schema](https://libtmux.org/en/perl/latest/reference/libtmux-schema/) class 1 member Catalog and explicit record adapters [Selection](https://libtmux.org/en/perl/latest/reference/libtmux-selection/) class 10 members Native array selections with fixed query returns [Iterator](https://libtmux.org/en/perl/latest/reference/libtmux-selection-iterator-cvun/) class 1 member Local cursor over frozen membership [SessionSelection](https://libtmux.org/en/perl/latest/reference/libtmux-sessionselection/) class 10 members Native array selection of captured session entities [WindowLinkSelection](https://libtmux.org/en/perl/latest/reference/libtmux-windowlinkselection/) class 10 members Native array selection of captured window_link entities [WindowSelection](https://libtmux.org/en/perl/latest/reference/libtmux-windowselection/) class 10 members Native array selection of captured window entities Snapshots 1 type [Snapshot](https://libtmux.org/en/perl/latest/reference/libtmux-snapshot/) class 14 members Captured graph with explicit completeness Errors 24 types [X](https://libtmux.org/en/perl/latest/reference/libtmux-async-x/) class In LibTmux::Async Shutdown has started and new work is refused. Callers may still observe cleanup through "close" in LibTmux::Async::Transport. [Closed](https://libtmux.org/en/perl/latest/reference/libtmux-async-x-closed/) exception Shutdown has started and new work is refused. Callers may still observe cleanup through [`"close" in LibTmux::Async::Transport`](https://libtmux.org/en/perl/latest/reference/libtmux-async-transport-close/ "method"). [QueueFull](https://libtmux.org/en/perl/latest/reference/libtmux-async-x-queuefull/) exception The configured running and pending limits are occupied. No command was submitted for this request. Returned through a failed [Future](https://metacpan.org/pod/Future). [X](https://libtmux.org/en/perl/latest/reference/libtmux-x/) class In LibTmux 12 members Typed failures with readable diagnostics [AcquisitionRace](https://libtmux.org/en/perl/latest/reference/libtmux-x-acquisitionrace/) exception 12 members Observed generations or topology changed during capture. [Cancelled](https://libtmux.org/en/perl/latest/reference/libtmux-x-cancelled/) exception 12 members Execution was cancelled; cancellation does not roll back effects. [Codec](https://libtmux.org/en/perl/latest/reference/libtmux-x-codec/) exception 12 members A tmux record or field could not be decoded. [Command](https://libtmux.org/en/perl/latest/reference/libtmux-x-command/) exception 12 members tmux reported nonzero status; result retains stdout/stderr/status. [Creation](https://libtmux.org/en/perl/latest/reference/libtmux-x-creation/) exception 14 members A creation command succeeded but subsequent receipt decoding or capture failed. `created` returns a minimal generation-scoped entity handle when the command's receipt was decoded; other fields remain unloaded. `cause` preserves the original acquisition failure. `dispatched` is true. The returned handle permits explicit, generation-checked cleanup; absent receipts leave effects uncertain. See [`"new_session" in LibTmux::Server`](https://libtmux.org/en/perl/latest/reference/libtmux-server-new_session/ "method"). [InvalidArgument](https://libtmux.org/en/perl/latest/reference/libtmux-x-invalidargument/) exception 12 members Invalid operation or transport argument before dispatch. [InvalidFilter](https://libtmux.org/en/perl/latest/reference/libtmux-x-invalidfilter/) exception 12 members Invalid criteria data; path, expected, and received describe the boundary. [InvalidSelection](https://libtmux.org/en/perl/latest/reference/libtmux-x-invalidselection/) exception 12 members Undefined, hole, wrong-kind, or incompatible-generation membership. [MultipleMatches](https://libtmux.org/en/perl/latest/reference/libtmux-x-multiplematches/) exception 12 members At least two occurrences matched. matched_ids preserves occurrence diagnostics. [NoMatch](https://libtmux.org/en/perl/latest/reference/libtmux-x-nomatch/) exception 12 members No occurrence matched one(). [NoSuchTarget](https://libtmux.org/en/perl/latest/reference/libtmux-x-nosuchtarget/) exception 12 members The selected stable target no longer exists. Native result diagnostics are retained. This differs from a stale generation and from an arbitrary command failure; acquire a new snapshot before choosing recovery. [OutputLimit](https://libtmux.org/en/perl/latest/reference/libtmux-x-outputlimit/) exception 12 members Retained process output exceeded the configured bound. [QueryMismatch](https://libtmux.org/en/perl/latest/reference/libtmux-x-querymismatch/) exception 12 members Native candidates disagree with captured local matches, or an expert native query returned an uncaptured ID. `details->{verification}` contains the detached [`"VERIFICATION REPORT" in LibTmux::Server`](https://libtmux.org/en/perl/latest/reference/libtmux-server/#LibTmux%3A%3AServer.section.VERIFICATION%2520REPORT "class"). The cause may be concurrent change, a translation defect or backend semantics; the comparison does not identify it. [`"query_panes" in LibTmux::Server`](https://libtmux.org/en/perl/latest/reference/libtmux-server-query_panes/ "method") throws this for require or expert queries, while auto reports fallback through its optional observer. [Spawn](https://libtmux.org/en/perl/latest/reference/libtmux-x-spawn/) exception 12 members The executable could not start; dispatch is distinguished from command failure. [StaleReference](https://libtmux.org/en/perl/latest/reference/libtmux-x-stalereference/) exception 12 members A captured generation or contextual target no longer identifies the same resource. [Timeout](https://libtmux.org/en/perl/latest/reference/libtmux-x-timeout/) exception 12 members Execution exceeded its deadline; effects may already have occurred. [Transport](https://libtmux.org/en/perl/latest/reference/libtmux-x-transport/) exception In LibTmux::X 12 members Process supervision or result framing failed. [Unloaded](https://libtmux.org/en/perl/latest/reference/libtmux-x-unloaded/) exception 12 members A required field or relation is not available in captured data. [Unsupported](https://libtmux.org/en/perl/latest/reference/libtmux-x-unsupported/) exception 12 members A daemon or execution capability is unavailable. [UnsupportedValue](https://libtmux.org/en/perl/latest/reference/libtmux-x-unsupportedvalue/) exception 12 members A local value has no supported portable wire representation. Errors — Server 1 type [NoServer](https://libtmux.org/en/perl/latest/reference/libtmux-x-noserver/) exception 12 members The selected server cannot be reached. Constants and enums 1 type [CommandResult](https://libtmux.org/en/perl/latest/reference/libtmux-commandresult/) class 6 members Completed or partial subprocess outcome Async 3 types [Async](https://libtmux.org/en/perl/latest/reference/libtmux-async/) module Optional Future-based libtmux execution [Server](https://libtmux.org/en/perl/latest/reference/libtmux-async-server/) class In LibTmux::Async 43 members Optional Future facade over the core protocol [Transport](https://libtmux.org/en/perl/latest/reference/libtmux-async-transport/) class In LibTmux::Async 3 members Bounded asynchronous process execution Other 2 types [LibTmux](https://libtmux.org/en/perl/latest/reference/libtmux/) module Explicit tmux commands and captured graph queries [Entity](https://libtmux.org/en/perl/latest/reference/libtmux-entity/) class 5 members Read-only handle retaining a captured graph ## By module 8 modules * LibTmux 24 * [Client](https://libtmux.org/en/perl/latest/reference/libtmux-client/) * [Client​Selection](https://libtmux.org/en/perl/latest/reference/libtmux-clientselection/) * [Command​Result](https://libtmux.org/en/perl/latest/reference/libtmux-commandresult/) * [Entity](https://libtmux.org/en/perl/latest/reference/libtmux-entity/) * [Filter](https://libtmux.org/en/perl/latest/reference/libtmux-filter/) * [Operation](https://libtmux.org/en/perl/latest/reference/libtmux-operation/) * [Pane](https://libtmux.org/en/perl/latest/reference/libtmux-pane/) * [Pane​Selection](https://libtmux.org/en/perl/latest/reference/libtmux-paneselection/) * [Process​Job](https://libtmux.org/en/perl/latest/reference/libtmux-processjob/) * [Query​Plan](https://libtmux.org/en/perl/latest/reference/libtmux-queryplan/) * [Schema](https://libtmux.org/en/perl/latest/reference/libtmux-schema/) * [Selection](https://libtmux.org/en/perl/latest/reference/libtmux-selection/) * [Server](https://libtmux.org/en/perl/latest/reference/libtmux-server/) * [Session](https://libtmux.org/en/perl/latest/reference/libtmux-session/) * [Session​Selection](https://libtmux.org/en/perl/latest/reference/libtmux-sessionselection/) * [Snapshot](https://libtmux.org/en/perl/latest/reference/libtmux-snapshot/) * [Transport](https://libtmux.org/en/perl/latest/reference/libtmux-transport/) * [Window](https://libtmux.org/en/perl/latest/reference/libtmux-window/) * [Window​Link](https://libtmux.org/en/perl/latest/reference/libtmux-windowlink/) * [Window​Link​Selection](https://libtmux.org/en/perl/latest/reference/libtmux-windowlinkselection/) * [Window​Selection](https://libtmux.org/en/perl/latest/reference/libtmux-windowselection/) * [Workspace](https://libtmux.org/en/perl/latest/workspace/reference/libtmux-workspace/) * [X](https://libtmux.org/en/perl/latest/reference/libtmux-x/) * [Async](https://libtmux.org/en/perl/latest/reference/libtmux-async/) * LibTmux::Async 3 * [Server](https://libtmux.org/en/perl/latest/reference/libtmux-async-server/) * [Transport](https://libtmux.org/en/perl/latest/reference/libtmux-async-transport/) * [X](https://libtmux.org/en/perl/latest/reference/libtmux-async-x/) * LibTmux::Selection 1 * [Iterator](https://libtmux.org/en/perl/latest/reference/libtmux-selection-iterator-cvun/) * LibTmux::Workspace 1 * [X](https://libtmux.org/en/perl/latest/workspace/reference/libtmux-workspace-x/) * LibTmux::X 21 * [Acquisition​Race](https://libtmux.org/en/perl/latest/reference/libtmux-x-acquisitionrace/) * [Cancelled](https://libtmux.org/en/perl/latest/reference/libtmux-x-cancelled/) * [Codec](https://libtmux.org/en/perl/latest/reference/libtmux-x-codec/) * [Command](https://libtmux.org/en/perl/latest/reference/libtmux-x-command/) * [Creation](https://libtmux.org/en/perl/latest/reference/libtmux-x-creation/) * [Invalid​Argument](https://libtmux.org/en/perl/latest/reference/libtmux-x-invalidargument/) * [Invalid​Filter](https://libtmux.org/en/perl/latest/reference/libtmux-x-invalidfilter/) * [Invalid​Selection](https://libtmux.org/en/perl/latest/reference/libtmux-x-invalidselection/) * [Multiple​Matches](https://libtmux.org/en/perl/latest/reference/libtmux-x-multiplematches/) * [No​Match](https://libtmux.org/en/perl/latest/reference/libtmux-x-nomatch/) * [No​Server](https://libtmux.org/en/perl/latest/reference/libtmux-x-noserver/) * [No​Such​Target](https://libtmux.org/en/perl/latest/reference/libtmux-x-nosuchtarget/) * [Output​Limit](https://libtmux.org/en/perl/latest/reference/libtmux-x-outputlimit/) * [Query​Mismatch](https://libtmux.org/en/perl/latest/reference/libtmux-x-querymismatch/) * [Spawn](https://libtmux.org/en/perl/latest/reference/libtmux-x-spawn/) * [Stale​Reference](https://libtmux.org/en/perl/latest/reference/libtmux-x-stalereference/) * [Timeout](https://libtmux.org/en/perl/latest/reference/libtmux-x-timeout/) * [Transport](https://libtmux.org/en/perl/latest/reference/libtmux-x-transport/) * [Unloaded](https://libtmux.org/en/perl/latest/reference/libtmux-x-unloaded/) * [Unsupported](https://libtmux.org/en/perl/latest/reference/libtmux-x-unsupported/) * [Unsupported​Value](https://libtmux.org/en/perl/latest/reference/libtmux-x-unsupportedvalue/) * LibTmux::Async::X 2 * [Closed](https://libtmux.org/en/perl/latest/reference/libtmux-async-x-closed/) * [Queue​Full](https://libtmux.org/en/perl/latest/reference/libtmux-async-x-queuefull/) * LibTmux::Workspace::X 3 * [Config](https://libtmux.org/en/perl/latest/workspace/reference/libtmux-workspace-x-config/) * [Conflict](https://libtmux.org/en/perl/latest/workspace/reference/libtmux-workspace-x-conflict/) * [Load](https://libtmux.org/en/perl/latest/workspace/reference/libtmux-workspace-x-load/) * Types 7 * [Async](https://libtmux.org/en/perl/latest/reference/libtmux-async/) * [Closed](https://libtmux.org/en/perl/latest/reference/libtmux-async-x-closed/) * [Lib​Tmux](https://libtmux.org/en/perl/latest/reference/libtmux/) * [Queue​Full](https://libtmux.org/en/perl/latest/reference/libtmux-async-x-queuefull/) * [X](https://libtmux.org/en/perl/latest/reference/libtmux-async-x/) * [X](https://libtmux.org/en/perl/latest/workspace/reference/libtmux-workspace-x/) * [Lib​Tmux](https://libtmux.org/en/perl/latest/reference/libtmux/)