If you experienced Error 75:  Path/File Access Error when exporting file, refer to steps and things to check below:
  1. Check location you are exporting file/report to as windows is saying it is not available
  2. If location is on C drive, make sure an actual folder on C drive is selected
  3. Do not select a temp folder as they have special restrictions
  4. Try exporting to a usb drive to isolate
  5. User should be log in as administrator
  6. Try to register reg.bat file by:
  • Going to C: Drive
  • Click HySport Folder
  • Select the SwMM8/SwMM7/TM8/TFMM6/TFTM4-2 folder  
  • Right click on reg.bat file and run as administrator
          7.  Delete CFILE01.cl2 and HFILE001.hy3 files by:
  • Going to C: Drive
  • Click HySport Folder
  • Select the SwMM8/SwMM7/TM8/TFMM6/TFTM4-2 folder  
  • Search for CFILE01.cl2 and HFILE001.hy3
  • Delete both 
  • try export again.