the command line should have a flag for calling BC, such as / ro # or / # ro or / (side) readonly (where the side is left or right), this prevents editing.
these flags exist because different ones often cause temporary files for diff, in particular from SCC. and Vault probably has one "external diff" command, so you need to choose whether the flags are always there, it protects you from undetected editing a temporary file and frees up this work when you close the diff tool or not.
armel
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