Problem solved. The problem was getting one file type, *.pjm, to check out concurrently, while having the other files types we use check out exclusively. In VSS terms, having multiple checkout for one file type (which we had to accomplish by using srcsafe.ini commands to make a particular directory multiple checkout, and all others not, in VSS). The (or a) trick in Vault is to: In Vault Admin, for the given repository (or all, your choice): a) make the entire repository concurrent checkout style (uncheck Require Exclusive Locks) b) take all but the single file type used in development out of the mergeable list of file types On the client, in Options: a) uncheck request exclusive locks b) indicate Make Readonly for checkout style Now, when the checkout dialog appears, request exclusive lock will be unchecked, when you know you really want it checked; but not to worry, as Vault will see all but the desired file type to be a "binary" file, and demand an exclusive lock anyway. Maybe all of this is not required; but since our work occurs through the COM API calls from our IDE in Visual FoxPro, I decided to make sure all defaults were what we needed on the client settings. Whether needed or not, it is working this way. Congratulations to the designers for making this workaround possible.hth,