Hello,
If you run randomise with the --debug option, randomise will display the maximum statistic value detected for each permutation - if the permuted values are much bigger than those for the unpermuted case then this problem will occur. You can also run randomise for one permutation with the -R option to check what the unpermuted statistic image looks like in each case.
Many Regards
Matthew
> We did explicitly specify a mask for the data in this comparison. randomise ran and got stuck over an entire weekend with the message: "Warning: tfce has detected a large number of integral steps. This operation may require a great deal of time to complete." ... According to prior posts this message has been encountered when the design matrix is incorrect, however, this same comparison ran successfully using the same design matrix, same mask, and same data without binarization. This, to us, seems puzzling. Is there anything else we might be overlooking? Thanks for the assistance!
>
> Sincerely,
> Dharshan Chandramohan
>
