I DON'T KNOW,WHAT KIND OF frames will be considered unmultiple?

My inputs' format is dicom,when it is 200kB,the software can run.but when the dicom is more than 500kB,the next error will happen:

Checking for (invalid) multi-frame inputs...

ERROR: input(s) cannot have multiple frames!

/usr/local/freesurfer/subjects/18I/mri/orig/001.mgz has 17 frames