https://userapps.support.sap.com/sap/support/knowledge/en/3532327
3532327 - SUM Stops at phase MAIN_SHDIMP/SUBMOD_SHD2_RUN/NTACT_ALTNT with error pgntab call: table...
You are doing ABAP system upgrade via SUM. An error occurred in phase "MAIN_SHDIMP/SUBMOD_SHD2_RUN/NTACT_ALTNT". In phase error log file "NTMOVALTNT.ELG",...