C00B010C

Explanation
  The record format indicates variable, but the
lrecl or blksize is not valid. This failure occurred trying to open
an existing OS file for write. 

Programmer response
  Correct the mode argument.  The lrecl
for a variable record format data set must be at least 4 or equal
to X.  The blksize must be at least 8 or 0 and no more than 32760.
 The value lrecl=X is sometimes used for spanned data sets. 

Symbolic Feedback Code
 JrEdc1opsEbadmode12