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Added try except loop to prevent cb from crashing when connection is … #732

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Merged
mlj5j merged 1 commit into from
Jun 24, 2026
Merged

Added try except loop to prevent cb from crashing when connection is … #732

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28 changes: 23 additions & 5 deletions Gui/QtGUIutils/QtApplication.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1329,10 +1329,19 @@ def goExpert(self):
def GlobalStop(self):
print("Critical status detected: Emitting Global Stop signal")
self.globalStop.emit()
self.instruments.off()
if self.expertMode:
self.releaseHVPowerPanel()
self.releaseLVPowerPanel()
try:
self.instruments.off()
if self.expertMode:
self.releaseHVPowerPanel()
self.releaseLVPowerPanel()
except Exception:
QMessageBox.critical(
None,
"Cold Box Connection Error",
"Warning: connection lost with the cold box.\n\n"
"The instruments could not be switched off. Please check the "
"connection to the cold box.",
)

###############################################################
## Main page and related functions (END)
Expand Down Expand Up @@ -1373,7 +1382,16 @@ def closeEvent(self, event):
logger.debug("Failed to stop Tessie monitoring cleanly during application shutdown")
print("Application terminated")
if self.instruments is not None:
self.instruments.off()
try:
self.instruments.off()
except Exception:
QMessageBox.critical(
None,
"Cold Box Connection Error",
"Warning: connection lost with the cold box.\n\n"
"The instruments could not be switched off during shutdown. "
"Please check the connection to the cold box.",
)

# If you didn't start the Peltier controller, tempPower won't be defined
if site_settings.cooler == "Peltier":
Expand Down
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