iMPACT tool operates the ISF by the size of the MCS file. So, if you want to eraset he entire ISF, you havetwooptions:
1. Generate an MCS file as large as the ISF, and assign this file to iMPACT, and Erase the ISF
2. Generate an SVF file to erase the ISF and write the config data in
These solutions have advantages and disadvantages.
Solutionone is fast but multiple steps.
Solutiontwo has anSVF file that is hard to generate and very slow. But, it is easy to use.