When using a node variable (Node Settings / Node Variables section) for the execution context of Uproc, the relative values may be loaded after the environment variable that are loaded by the uxjobinit, the is a fix for that since Dollar Universe 6.4.01.
In some cases, we have customers having Dollar Universe values defined in the Node Settings / Node Variables section even if that shouldn't but it was not causing any trouble until an upgrade to Dollar Universe version >= 6.4.01 because now the value overwrite the one of the environment variable and the, the Uproc execution can be wrong
The solution is to remove the variable from the Node Settings / Node Variables section