Earlier this evening I was working on a project and put together a quick batch file to uninstall and reinstall a solution. I issued the following command (in a batch file):
STSADM -o addsolution -filename XmlWebParts.WSP
and I got back in response:
“xmlwebparts.wsp” has an unsupported extension, and cannot be added to the solution store.
Having never seen this particilar error from STSADM I was intrigued. I decided to try the following command:
STSADM -o addsolution -filename XmlWebParts.wsp
Operation completed successfully.
Say what? It turns out that for some reason STSADM -o addsolution wants the .wsp extension in lower case.