>> error of "Unable to Determine the file format"
(Please post a copy of the complete error message in every case.)
Most likely the BMP-file is damaged. Are you able to open the file with another software?
A = dicomread('name.dcm')
>> error "The parameter name.dcm is not recognized by imageDisplayParsePVPairs."
Mysterious. I guess, that you have redefined a built-in function and the toolbox functions are confused. Try to remove all user-defined folders from the path, e.g. by:
Then try to call imread and dicomread again.