There have been some questions regarding support of Ansys result files in FEMAP 11.0.1
FEMAP 11.0.1 officially supports Ansys rst files up to v14.0
If you try to read result files from a version of Ansys greater than 14.0 then FEMAP will likely fail to read anything issuing an error indicating the file format is different than what was expected.
There is no workaround as Ansys has made changes to the binary file format in version 14.5 and 15.0
The next release of FEMAP 11.1 will support both Ansys 14.5 and Ansys 15.0 result files.