QUESION:

Why am I getting Error(4): Invalid extension, in file 'C:\Teamsource\Archives\root.tsdata' when I try to open the Remote screen in TeamSource?

Answer:

This is caused by a bug in TeamSource. The documentation for Productions states that a Production can be Defined with Source = *.RC and Target = *.RES, but after these values are entered TeamSource adds a period in front of them so the result is '.*.RC' and '.*.RES'. These values are accepted but unfortunately cause the error when the project is reopened in the future.

WORKAROUND:

Do not use the asterisk notation, just enter the extension. If you've already entered this notation you can recover by deleting the 'root.tsdata.z' file, but you will then need to re-do check ins.