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Please provide a short description of the issue:

When copying an existing Google Sheet with attached Google Script code containing custom functions (accessed as spreadsheet functions) using Google_Service_Drive_Files_Resource->files->copy($fileId, Google_Service_Drive_DriveFile) when the authenticated user is a Google Service Account user, the custom functions are not accessible in the copied Sheet and the following error is returned when they are accessed: "Server error occured. Please try saving the project again. (line 0)."


Please provide a small sample script that reliably reproduces the issue.
The sample should run as-is or with minimal setup, without external
dependencies.



What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?


What is the project key (found under "File > Project properties")? The
project key does not give the Apps Script team access to your source
code or data. We use it to look up debug information about your script.

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Please provide any additional information below.

This was working prior to 15 October 2015 and is now causing failures in our production system.


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