unable to fix error in lvs

[dsnaveen1]

Run parallel Netgen with 'mpirun -np xy netgen' optfile ./ng.opt does not exist - using default values togl-version : 2 OCC module loaded ERROR: This operation needs a mesh errinfo: This operation needs a mesh while executing "Ng_ExportMesh $file $exportfiletype" invoked from within ".#ngmenu.#ngmenu#file invoke active" ("uplevel" body line 1) invoked from within "uplevel #0 [list $w invoke active]" (procedure "tk::MenuInvoke" line 50) invoked from within "tk::MenuInvoke .#ngmenu.#ngmenu#file 1" (command bound to event) Thank you for using NETGEN netgen failure: No file comp.out. Premature exit. Synthesis flow stopped due to error condition.