ARC1267I

Explanation
 A SETSYS command has specified that the 3480 single-file
format be used. During migration of a data set to a 3480 tape volume, DFSMShsm has
issued a NOTE macro to obtain the block ID of the next data block
to be written. The NOTE macro has failed. The data set being migrated
is named either in the preceding ARC1001I message, or in the associated
ARC0734I message containing the return code 67. The reason codes for
ARC1001I or ARC0734I are as follows:  Reascode
Meaning
4
Does not support this block ID.
8
Invalid input parameters have been specified.
12
An I/O error has occurred during the RDBLKID command.

System action
 Migration of the data set fails. The 3480 tape
volume used for output is marked full to prevent its further use,
and another tape volume is selected. DFSMShsm processing continues.

Programmer response
 For more information about the NOTE macro
and its return codes, see z/OS DFSMS Using Data Sets or z/OS DFSMS Macro Instructions for Data Sets. 

Source
 DFSMShsm