NJOY2016.63
This fixes a bug in ERRORR when using the 999 option. When using this option, the input and output tapes are not closed in Fortran. This causes problems in NJOY21 as the output from ERRORR isn't completely written to disk before the next module starts. This update simply closes files nitape and notape which resolves the issue.
In addition, some logic statements in the GROUPR conver and ACER convr subroutines have been corrected to fix failures in the test suite when building in Debug mode.