I've been having problems migrating some SSIS packages from localhost (32bit) to the server (Windows Server 2003 64bit, SQL Server 2005 Enterprise SP2). These packages have Excel data connectors, and hence must be run in 32 bit mode. When I try to run them with the 32bit dtexec, I get the "generic" error "the package failed to load" (0xC0010014). I stripped down the package until I found the source of the error: a ForEach container, using the File Enumerator with the directory set to a variable. When I remove the variable setting it works, when I add the variable expression it fails. Note: this does not fail in the 64bit dtexec.

I read KB 913817 and determined that this was not causing my problem. When I open the package in Business Intelligence Studio on the server itself, I get an error when I try to edit the expressions on the ForEach loop (but only when the Enumerator is set to File).Poking around the SSIS DLLs, I found c:\program files (x86)\microsoft sql server\90\dts\foreachenumerators\ForEachFileEnumerator.dll. Re-registered it with regsvr32. Voila, problem solved.