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Visitor
Visitor
10,724 Views
Registered: ‎01-18-2015

Isim fatal error

HI,
I've been simulating my design using Isim, and for some reason it began collapsing. I am not sure what's causing the problem. Moreover, some waveforms are acting strangely, and unexpectedly.
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18 Replies
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Xilinx Employee
Xilinx Employee
10,722 Views
Registered: ‎02-14-2014

Re: Isim fatal error

Hello @assaf108,

 

Check if this thread helps
https://forums.xilinx.com/t5/New-Users-Forum/simulation-failed-to-launch-14-2/m-p/648859#M30381

 

Else post the complete error which you are facing. 

Regards,
Ashish
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Visitor
Visitor
10,715 Views
Registered: ‎01-18-2015

Re: Isim fatal error

It's not the same problem. The simulator launchs, but misbehaving later on.
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Xilinx Employee
Xilinx Employee
10,711 Views
Registered: ‎08-01-2008

Re: Isim fatal error

you may send us snapshot or log file to understand the issue
Thanks and Regards
Balkrishan
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Teacher
Teacher
10,700 Views
Registered: ‎07-09-2009

Re: Isim fatal error

suggestions,

 

exit vivado and delete the sims and cache folders,

     then re make.

 

The thing thats caused my sims to crash out have been things like 

 

the above cache problem

 

signals that 'loop'  / never stabalise, 

 

test bench errrors, i.e. not in the code , but the testing code that is only used in simulation.

 

I've ended up commenting out lumps of my code before now to try to isolate where the problem is.

 

good luck

<== If this was helpful, please feel free to give Kudos, and close if it answers your question ==>
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Visitor
Visitor
10,695 Views
Registered: ‎01-18-2015

Re: Isim fatal error

so you suggst re-installing Isim? im using ISE 14.4 if that gives you a clue, and writing in verilog.

Screenshot_2015-09-02-22-20-00.jpgScreenshot_2015-09-02-22-18-44.jpg

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Xilinx Employee
Xilinx Employee
10,693 Views
Registered: ‎08-01-2008

Re: Isim fatal error

http://www.xilinx.com/support/answers/36813.html
Thanks and Regards
Balkrishan
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Xilinx Employee
Xilinx Employee
10,693 Views
Registered: ‎08-01-2008

Re: Isim fatal error

http://www.xilinx.com/support/answers/33217.html

Please try with ISE 14.7 release .
Thanks and Regards
Balkrishan
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Visitor
Visitor
10,684 Views
Registered: ‎01-18-2015

Re: Isim fatal error

I'll check 14.7 out
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Moderator
Moderator
10,670 Views
Registered: ‎04-17-2011

Re: Isim fatal error

Try running the simulation by adding less signals in the waveform window or you can dump the signals in a VCD file and open it a waveform viewer for later use if the signals are not coming properly.

The details for the generation of the VCDfiles are contained in the ISim User'sGuide under the Writing Activity Data for Power Consumption section. The following is an example from that guide:

1.) Run ISim in command line mode
2.) Enter the following ISim commands to dump all signals of the simulation to the VCD file:

vcd dumpfile mydump.vcd
vcd dumpvars -m /
run 100ns
vcd dumpflush

3.) The VCD file will be saved in the current working directory.

4.) Open the VCD file in the waveform viewer such as GTKWave

http://sourceforge.net/projects/gtkwave/
Regards,
Debraj
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Visitor
Visitor
10,356 Views
Registered: ‎01-18-2015

Re: Isim fatal error

Ok i tried 14.7 didnt work. I'll try creating vcd file..
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Visitor
Visitor
10,348 Views
Registered: ‎01-18-2015

Re: Isim fatal error

well, I created a VCD file, but I cant install GTKwave on my PC.

I simulated my design on another computer - and it worked. I have absolutly no idea why it keeps crashing.

any suggestions?

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Moderator
Moderator
10,341 Views
Registered: ‎04-17-2011

Re: Isim fatal error

There are many Free VCD viewer other than GTK. You can google them out. One example is:
http://www.iss-us.com/wavevcd/

This is a system specific issue and mostly relates to the .dll interaction between your system and ISIM.exe. You can try to use the VCD option as a workaround and may be in future, use the Dependency Walker (http://www.dependencywalker.com/) tool to see which .dll is missing. You can also try to copy the entire image of ISE from the working machine to the current machine where it fails and check.
Regards,
Debraj
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Visitor
Visitor
10,330 Views
Registered: ‎01-18-2015

Re: Isim fatal error

I solved it. I copied my whole work directory to the desktop, isim stopped crashing. There are still some minor graphical glitches, but it seems to be working properly.
Any ideas about problematic path names?
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Moderator
Moderator
10,323 Views
Registered: ‎07-21-2014

Re: Isim fatal error

@assaf108

 

This could be possible if path length exceeds 260-Byte.

 

Thanks,
Anusheel
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Visitor
Visitor
10,320 Views
Registered: ‎01-18-2015

Re: Isim fatal error

I checked again, it did not solve the problem completely, its a partial solution.
It seems to happen now only when watching the start of the simulation or when pressing zoom to full view.
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Visitor
Visitor
10,319 Views
Registered: ‎01-18-2015

Re: Isim fatal error

Could the test fixture code itself be the problem?
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Moderator
Moderator
10,316 Views
Registered: ‎07-21-2014

Re: Isim fatal error

@assaf108

 

Can you test the design on different machine to understand whether this is a design specific issue or machine specific issue?

 

Thanks,
Anusheel
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Visitor
Visitor
10,310 Views
Registered: ‎01-18-2015

Re: Isim fatal error

I'll try simating with vhdl test bench. Might just work..
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