Just upgraded to 7.4. In Admin I can see all of our products if I just click on "List Products" but, if I try filtering by any category, I get a 500 error. The live site works and search works.

Hi DavidX
The first thing I would try is to run the v7.4 updatestore.asp script again.
If you do that and still get the 500 error we need to find out what the actual error message is so could you ask your host to enable Detailed Error Messages and then let us know what the error message is you are getting.

Vince

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I figured it out. I had put this:

customquickupdate="pID:ID Field"

into the includes file. It worked great but I guess it messed with other stuff as I found this:

POST /vsadmin/adminprods.asp |3475|80040e14|Ambiguous_column_name_'pID'. HTTP/2.0

in the logs.

Any way to be able to reinsert ID Field in the Quick Update?

I'm not sure it's possible, or you want to be updating the product ID via quick update.
When you change the product ID, several other items are updated as well.
Being it's typically something that almost never changes, do you really need to update the product ID often enough where you need to do it via quick update?

David