I found that the LSCoffset script didn't work today. The script is supposed to null the electrical offsets in all the LSC channels.
I went through the sentences in the script and eventually found that the tdsavg command returns 0 every time.
I thought this was related to the test points, so I ran the following commands to flush all the test point running and the issue was solved.
[diag]> diag tp clear *
EDIT, JCD 11June2012: 3rd line there should just be [diag]> tp clear *
[diag]> tp clear *