Error MKS6412130: Type "ALM_Requirement Document" does not exist. What is the reason behind it ?

What software you talking about?

Looking at the error message showing the type name with the "ALM_" prefix, my guess is that your system is configured without the prefix (so your type is "Requirement Document") and you're doing an import with a default gateway mapping that specifies the prefix.

If that's the case, you have to edit/create your own mapping and remove "ALM_".

On the server, the mappings are under "...\data\gateway\mappings", on the client, under "...\config\gateway\mappings", where "..." indicates the server or client root directory.

Then, one directory above, there's the file "gateway-tool-configuration.xml" that puts them together with the parsers.

I know, a major headache! I hope you have someone to help you.

LLawton is likely right, in that one of the type mappings may be pointing to an incorrect, or out-dated type name, not matching what is currently configured as the type name, on your Integrity server.

I'd suggest opening a Support case, with PTC Integrity (Windchill RV&S) support.

Mike