Installing ArcIMS 9.3 on Vista or Vista 64: Internal Error 2738

A quick note to the web: if you are trying to install ArcIMS 9.3 on Vista, you may run into the cryptic fatal error "Internal Error 2738". Apparently the ESRI installers require VB Script (say it ain't so!) and Vista doesn't register it by default (perhaps a security hole they wanted to plug?). You have to register it yourself by opening an administrator command prompt and running "regsvr32 vbscript.dll".

If you're on Vista, it's probably in C:\Windows\System32. If you're on Vista 64 there's one there but it won't do you any good, as the installer runs as a 32 bit process. (As you recall, System32 holds 64-bit DLLs on Vista 64. Makes perfect sense, right?) You'll need to register the vbscript.dll in C:\Windows\SysWOW64.

Thanks to Swapna at ESRI support services for resolving this issue in just a couple of hours on an otherwise quiet Wednesday afternoon.