System Generator on ISE 13.1

Hello everybody.
I am experiencing problems trying to run System Generator within ISE v13.1. In order to isolate the problem I implemented a very simple design, which is only one In gateway, one Out gateway and one AddSub block.
It happens that System Generator is not able to generate the core for the AddSub block (what any other block). Looking at the error log I get:
INFO:sim - Generating implementation netlist for   'addsb_11_0_1846f6db66fd2e6e'...
INFO:sim - Pre-processing HDL files for 'addsb_11_0_1846f6db66fd2e6e'...
ERROR:sim - ios failureERROR:sim - Could not open destination for writing.
ERROR:sim - Failed executing Tcl generator.
ERROR:sim - Failed to generate 'addsb_11_0_1846f6db66fd2e6e'.  Failed executing   Tcl generator.
ERROR:sim:877 - Error found during execution of IP 'Adder Subtracter v11.0'
It seems it cannot open a file for writing in it. If I try to implement exactly the same design in ISE 12.4, at the same PC, it works fine. I tried reinstalling ISE several times without success.
I am using Windows XP Professional Edition Service Pack 3 and do have administrator privileges in my machine.
Does anybody have the same problem?
Thank you very much.
Daniel

Hi
The original issue was fixed using the temp path with no special characters in it which you can cross check.
Provide more details on the tools used and versions(ISE and MATLAB) and exact error message if the temp path is fine in your environment.
 

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