Often, official channels require logging into the B&R Automation portal, navigating a complex tree of versions, and downloading massive installation packages that require valid licenses to install. A "repack" suggests a simplified, single-download solution that bypasses these bureaucratic or financial hurdles.
Repacked libraries are often stripped of calibration data. You might design a circuit using a "REPACK" Parker valve, only to discover that the flow coefficients (Cv values) are from a generic valve, leading to failed real-world implementation. This defeats the entire purpose of simulation. Automation Studio Library Download REPACK