Hello,
cblrtsS.dll was the single-threaded runtime module in Net Express, which is no longer supported in Visual COBOL where everything is built with the multi-threaded runtime module, i.e. cblrtsM.dll.
If your program is looking for cblrtss.dll after recompiled with Visual COBOL, it is possible that it is called by your program. Or is it possible you have the cblrtss.lib file from Net Express linked with your program?
Regards,