If you have already run importasdm with asis='*', then you don't need to specify the asdm, only the ms: fixMyDelays('','my.delaycal',vis='uid.ms',False)
If you want to use this function as a wrapper for importasdm, then you can say: fixMyDelays('uid__blah_blah',None,None,True)
The optional 'sign' parameter can be used to flip the sign if and when someone changes the sign convention in TelCal. This command will handle single or multiple receiver bands in the ASDM.
-- ToddHunter - 2011-10-17