CST SAR problem at 90% for breast cancer detection

HI,
I am trying to determine the location of a tumor in a breast phantom using SAR option in CST.
The phantom is a half sphere layer of Skin and a tumor sphere of muscle representing the tumor.
When I run the program there is no issue until i reach the 90% mark in the post processing SAR simulation, from then on each 1 % takes about 4-5 hours of running time and near 96% the program stops.
I would be very thankful for any suggestions.
Thank you very much

You should attach your project file or at least post errors, warnings and simulation settings ?!