My apologies to those involved. I though that the fastbus crates would be using the header information to read the correct number of words after slots but it has JUST been revealed to me that this is not the case.
Since everyword except those protected by special words which cause the following words to be ignored are read out as specific fastbus module data the words I put it to diagnose the deadtime are being read as fastbus data.
The data on tape is fixable and Igor is working on that now. Most of the data on tape isn't an issue as the slots involved aren't important to those who were taking the data (example is slot 1 Roc 10 for N Delta).
The rest of the problem is now fixed by restoring the crl code from before March 2 (when the code was added) for rocs 1-4 and 10.
The problem for Roc10 started March 3.
The problem will be fixed on next download.