Create (or have) a survey S owned/created under Survey group A (gsid = A).

Create a user U that has permissions to access surveys (e.g., can view/copy surveys) but is not a member / not authorized for Survey group A.

Login as U.

In the survey list, use the “Copy” action (row action) on survey S.

Confirm copy.

##Expected behavior

The UI should show a clear permission error such as:
“You are not authorized to use this group (Survey group A). Choose a permitted group or request access.”

The operation should not crash with a 500.

Ideally, the copy dialog should prevent the action or allow selecting a target group the user is authorized to use.

##Actual behavior

UI shows: “500: Internal Server Error - Failed to copy survey” (generic).

In server logs / debug, the underlying save error contains:
Errors: Array ( [gsid] => Array ( [0] =>You are not allowed to use this group ) )

##Additional information / Logs

Observed in application/models/services/CopySurvey.php during destination survey save.

The failure happens at the moment destination survey is saved (destination survey inherits gsid that user cannot use).

The exception message is generic (“Failed to copy survey”) and does not surface the real authorization reason.

##Impact

Misleading 500 error causes operational noise and support escalations.

Real root cause is permissions, not system failure.

Users cannot self-resolve because the UI hides the actual reason.

##Suggested fix / improvement

Validate group permission before attempting to save the destination survey. If unauthorized, return a permission error (HTTP 403 and UI message).

Alternatively, when destinationSurvey->save() fails due to gsid authorization, catch that specific error and show it in the UI instead of throwing a generic exception.

Optionally allow choosing a target group (one the user is authorized to use) in the copy flow.

##Workaround

Add the user to the survey’s group (or grant access to that group), then copy works.