Archived ISE issues

[guaji214]

hi,everyone. I encountered a problem when I tried to systhesize my project by double clicking "View Rtl Schematic". I did in this way before to

see whether my project can be synthesized or not. But this time, failed. 

the error message is:

Process "Synthesis" failed
ERROR: Unable to launch the RTL Schematic process. The input NGR file
 cannot be found. Please rerun the "Synthesize - XST" process after setting
 the property "Generate RTL Schematic" to Yes or Only. This property can be
 found under the Synthesis Options category. 

Pls help me? I will appreciate your kind.

[endab]

Can you check the synthesis report file for other messages?

What are the messages prior to the Synthesis failed message?

[Chadn_na]

Did you set the Synthesis option to Generate an RTL Schematic?
This needs to be set so the ngr file is created.

[ramsnandu]

i too having the same problem in ise 10.1

i think this problem cause may be ipcores. 

error coming only  when recustomize or onemore ip core added to the code. 

even it was not opening the modelsim for simulation atleast not showing errors.

if i press  Generate an RTL Schematic it showing error like.

ERROR: Unable to launch the RTL Schematic process. The input NGR file

 cannot be found. Please rerun the "Synthesize - XST" process after setting

 the property "Generate RTL Schematic" to Yes or Only. This property can be

 found under the Synthesis Options category. 

if i create a new project and then create a new ipcores then it was working. 

is this ise10.1 problem? 

[jrford]

Ditto.  I have a project where the top level is a schematic.  I got the same error message in 10.1i where the project was an upgraded version from an old ISE (v5 or something like that).  I made a new project and magically the RTL schematic is available.

The option to generate the RTL schematic was enabled in the old project.  Setting it to "Only" instead of "Yes" had no impact.  I verified that the NGR file was being created by XST.  The viewer must be looking in the wrong path or something?

Note that if you simply open the NGR file it appears in the viewer correctly...the only thing that is broken appears to be the "View RTL Schematic" process step.

Message Edited by jrford on 03-02-2009 09:58 AM

[kenshail]

I get the same problem in ISE 10.1.03. It appears to occur after cleanup project files has been run a few time. (I find that I have to do that to be sure that design are implemented). Synthesize-XST goes green almost immediately then any further process (e.g. Implement) fails immediately. I get  "The input NGR file cannot be found. Please rerun the 'Synthesize - XS'" process after setting  the property "Generate RTL Schematic" to Yes or Only"  but it is already set to "Yes" The only way out of it is to create a new project or create the same one again in the same directory.

[kenshail]

Further information.

I subsequently found  http://www.xilinx.com/support/answers/30663.htm

However the .ngc file does exist and there is no .edn file is sight even when it is working.

[andrehardware]

Hi,

I solved the problem. But I use ISE 12.1. I wanted to add a block ram. I just added the vhd file. When syntehsis failed, I added the ngc file. Then the error appeared.

Solution: Just move the ngc hierachy window - where all source files are listed with the check box on the left - above the respective vhd file:

blockram.vhd

blockram.ngc     THIS FAILED

blockram.ngc

blockram.vhd    THAT WORKED

I guess the other just added their ngc file in the first place when they created a new project. That is why it suddenly worked.

best regards