You got return (''code 1'') from exit from external ''NBP'' binary.

Example running ''memtest.0'' and getting memory errors with ''onefail'':
[[https://b800.org/nCTtJ|{{https://b800.org/nCTtJ.png}}]]

See common [[err:7f8d8102|Return code 2]] and [[err:7f8d8100|Return code 0]]