https://userapps.support.sap.com/sap/support/knowledge/en/3261923
3261923 - CX_SHDB_PFW_EXCEPTION in phase PARRUN_CONF_REFCHAR, XPRAS_AIMMRG, etc. | SAP Knowledge...
When executing an upgrade via Software Update Manager, the upgrade is stopped in phase PARRUN_CONF_REFCHAR, XPRAS_AIMMRG, etc. Reviewing the upgrade logs...
https://ctan.math.washington.edu/tex-archive/macros/latex/contrib/parrun/?C=S;O=A
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