Environment variables

QtEDM uses the following environment variables:

Variable	Description
EPICS_DISPLAY_PATH	Platform-separated list of directories to search for ADL files and referenced images (: on Unix, ; on Windows)
EPICS_CA_ADDR_LIST	EPICS Channel Access address list
EPICS_CA_AUTO_ADDR_LIST	Enable/disable automatic CA address discovery
QTEDM_AUDIT_DIR	Optional audit-log directory override. The default remains ~/.medm.
QTEDM_ARCHIVER_URL	EPICS Archiver Appliance retrieval root used by archive-backed plots.
QTEDM_ARCHIVER_PROVIDER	Archive-provider plugin ID. Empty or archiver-appliance selects the built-in provider.
QTEDM_PLUGIN_PATH	Platform-separated list of absolute local plugin directories. QtEDM also scans the plugins directory next to its executable.
QTEDM_NOLOG	Set to a non-empty value other than 0 to disable control-write audit logging. Equivalent to -nolog.
MEDM_EXEC_LIST	MEDM-compatible semicolon-delimited entries added to the EXECUTE-mode context menu. Each item supplies a label and command.
QTEDM_TIMING_DIAGNOSTICS	Set to a non-empty value other than 0 to print timestamped startup-phase timing to standard error.
TRACK_MEM	Diagnostic memory sampling in the form [interval][:logfile]; the interval defaults to 60 seconds and output defaults to standard error.

Standard EPICS CA and PVA environment variables are consumed by EPICS Base. Diagnostic variables are intended for troubleshooting, not routine operator configuration. Automated tests also use private QTEDM_TEST_* variables; those are test interfaces and are intentionally not part of the supported operator configuration surface.