I am using LabVIEW 2015 SP1. During the mass compile of my project, I received an Compiler Error: EventData copy, err=1. It does not say anything about possible reasons for failure. Even if I make some changes in the code, the error remains the same.
Additional troubleshooting already is done:
It seems, that only this specific project is faulty.
This issue looks like software corruption. If it is possible, please create a new project and copy the old content to it, from the faulty project. If it will not help, follow those steps (After each step try to check if it helped):
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