What is your mkanalysis-sess command line?

Running the "selxavg3-sess -s" command line in FS-FAST for seed-based functional connectivity analysis

the following errors occurred:

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Temporally filtering

Error using chol

Matrix must be positive definite.

Error in fast_selxavg3b (line 947)

Wseg = inv(chol(toeplitz(acfrun))');

--------------------------

Thanks

Stefano

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