Seth,

yes, I see. I did not notice the .htm file, thank you.

The first "deltaCompression.log" succeeded. Then you make a bunch of DLL calls (as far as I can see). Is this your own DLL? Do you call into a DLL named "InstallDelta.dll" from that script?

It is nearly impossible for me to find out what might cause this Error #99 from the info I have.

Just curious: what happens when you EXCLUDE "deltaCompression.log" from your 2nd "Install Files..." action. Does it fail on "index" then? If this is the case, it is very well possible that one of the DLL calls corrupts the application stack. But it's just a guess.

Friedrich