how big is the job that you are trying to check-out, like number of dependent DFs, Wfs, functions ? are you doing check-out with dependents ?
do you see any Crash DMP files in %LINK_DIR%\log folder, when you are doing check-out operation ?
try disabling the following option in Designer
open Options windows from Designer Tools -> Options
in the Options window expand the Designer node, select General
Uncheck the option “calculate column mapping while saving the dataflow”
click OK
One more update is that when we close and re-open the designer and start exporting again , we dont get any error sometimes but sometimes the same error pops up.
How did you solve this problem? We’re having the very same issue when checking out a project with a large numer of WF and DF.
We’ve tried exiting DS and still same error.