Excel Crashes during automated macro to FTP a file

I am trying finalize a process that ftps files to a unix server. This process sporadically crashes during testing.

Below is an outline of what the process does.

Call ExportCSV
Create a .CSV file for export and save it to the C drive
Copy and paste values and formats from 4 seperate but contiguous ranges (ie using pastespecial)
Save .CSV
Close.CSV
End Sub

Call CreateBAT
Print text to batch file
Close batch file
End Sub

Call CreateTXT
Create a Notepad File for output
Print server credentials, instructions, etc to notepad file
Close Notepad file
End Sub

Call SendFile
Open batchfile and FTP
Wait 3 seconds
End Sub

Call KillFiles (currently commented out to observe files)
delete all files in directory
End Sub

The macro does not always crash. But it seems that when if it does crash that it has only pasted partial data to the .CSV file for export. Could this crash be fixed by inputting a DoEvents in between the CreateCSV module and the Create Batch module?
It seems a few users experience a majority of the crash instances. Maybe they have too much open on their desktop?

I have commented out all code after the exportCSV module. Excel hasn't crashed for me the multiple times I've tested the code through the ExportCSV module.

Maybe I only need a DoEvents between the ExportsCSV module and the CreateBAT module?