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AR# 35745

11.5 CORE Generator - "ERROR:ProjectMgmt:387 - TOE: ITclInterp::ExecuteCmd gave Tcl result 'can't read "instance": no such variable'"


I generate the Virtex-6 FPGA Integrated Block for PCI Express (PCIe) core using the CORE Generator plug-in within the ISE software. Generation of the core completes successfully. However, when I attempt to synthesize my entire design, I encounter the following error:

ERROR:ProjectMgmt:387 - TOE: ITclInterp::ExecuteCmd gave Tcl result 'can't read "instance": no such variable'." 

I am no longer able to generate my design due to this error.

How can I resolve this issue?


This issue has been fixed in the ISE Design Suite 12.1 release. Please download and install the latest release from the Downloads page:

To work around this issue in ISE Design Suite 11.5, generate the core using the CORE Generator standalone. You can then use the core as a blackbox in your design.

AR# 35745
Date Created 10/13/2010
Last Updated 10/28/2013
Status Active
Type General Article
  • ISE Design Suite - 11.5