I ran across a reference to the SYMCLI_CTL_ACCESS environment variable this morning and I've been searching in vain for any references to the ramifications of setting this from the default "Exclusive" to "Parallel". It seems to me that Parallel would be a better setting but there must be some reason for Exclusive to be the default. None of the documentation I can find explains anything beyond the (somewhat obvious) basics of what each setting means.

Can anyone tell me why I shouldn't just make this change, or at least what factors I should consider BEFORE making the change? So far the only references I see outside the official description is a few times when someone suggests "maybe you want to try this..."

This is a bit frustrating...!!!