T-READ giving Unexpected tape i/o status – check block size

Having mismatching block sizes can result in this issue.

If you try and T-READ data from blocks that are not the same size as the device assigned to you can get the following error:

:T-READ

Unexpected tape i/o status: Command =20; Status=00 00 00 0A.
Error 14 in Frame 1198 at Line 111
HALT – Program Execution Halted

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