Crystal Runtime exception: System.IO.DirectoryNotFoundException: Could not find a part of the path

Hi-

We have an application engine program to schedule the crystal  report.The program generates a single crystal  report and then writes the crystal reports into the application engine process output directory.Last week we came across an issue wherein the application engine process ran and process generated a crystal run time exception error message(ERROR MESSAGE BELOW).

We analyzed process scheduler log file but haven't been able to identify the root cause of the issue.

Any help to identify the root cause of this issue would be much appreciated.Many thanks!

(please note that the error data has been encrypted for security purpose)