Since UR7 get an error when running a Custom Task

I have a custom task that launches an excel file (the file is located in sharepoint).

In our test environment we have just upgraded to SCSM 2012 R2 UR7 and now when I run this task I get a message. 

Run Task Failed: <location of file>

Parameters: the system cannot find the file specified.

The file still does exist in that location. The task is exactly the same as it is in production and works with the same permissions from the same location.

Any suggestions. 

September 15th, 2015 3:19am