FPGA Intellectual Property
PCI Express*, Networking and Connectivity, Memory Interfaces, DSP IP, and Video IP
6343 Discussions

Error : Java exception

Altera_Forum
Honored Contributor II
1,073 Views

When I try to simulate an example I get always this error: 

 

Java exception occurred:  

java.lang.NullPointerException 

 

at com.altera.dspbuilder.simulation.Model.renameBlock(Unknown Source) 

 

at com.altera.dspbuilder.simulation.Mask.rename(Unknown Source) 

 

I don't know why I have always this message.
0 Kudos
6 Replies
Altera_Forum
Honored Contributor II
344 Views

Do you get this for all examples or just one specific one? 

 

One thing to try, is to make sure you have no unconnected input ports (especially to subsystems) as this has been known to cause problems.
0 Kudos
Altera_Forum
Honored Contributor II
344 Views

It happens only for this example. 

All ports are connected but there is a parameter that cannot be evaluated. 

Is it the cause of this error?
0 Kudos
Altera_Forum
Honored Contributor II
344 Views

It could be. Is this a design example shipped with DSP Builder? If so, let me know which one it is and I can take a look. If not, let me know the error message exactly and I can help you fix it.

0 Kudos
Altera_Forum
Honored Contributor II
344 Views

Actually I'm working on channel estimation & equalization reference design

0 Kudos
Altera_Forum
Honored Contributor II
344 Views

Try fixing the parameter error and see what happens. If the design can't initialise properly it's unlikely that DSPB will be able to synthesize it correctly.

0 Kudos
Altera_Forum
Honored Contributor II
344 Views

I think I know why the parameter cannot be evaluated, my problem is in the chest_generateLUT parameter, when I checked for Chest_generateLUT.m file which should be in the ref design files, I realized that this file is missing

0 Kudos
Reply