I thought I would share a situation we had in the event of helping someone else.
We updated Landmark from 10.1.1.62 to .73
We had reviewed release notes but I missed something that impacted several of our IPA's where we supply employee demographic files to other systems by way of placing files on network shares/other internal servers/ftp.
JT-1119336 Issue FileAccess node says successfully completed even though it can't delete the file.
This change caused all of ours to error with xxfile name not deleted because of java.lang.Exception: Access Denied or File might be opened by other process
Within the IPA our developers put in place of just a FileAccess(Delete File) node we added a FileAccess(File Exists) and a Branch so that if the file didn't exist it would not run the File Delete
The amazing thing after this change however is the drastic difference in run times.
Example of the one for our Time/Attendance system that has always ran 50-60+ minutes now is running in 2 minutes... yes, 2 minutes.
One of our benefit files went from 50+ minutes to 3 minutes! Plenty of other examples.
Hope this may help one of you 
