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Seeing error while exporting a pcell

GB20250109498

Hi, Encountering below error while building a pcell using script. Pcell is absolutely fine, but seeing issue while exporting. but  Not understanding the exact proplem,, can anybody help me?

PCELL CODE:

pcDefinePCell(
list( ddGetObj("LOCAL_LIB") "cellname" "layout")

(
(Fingers string "12")
(Nrows string "1")
(Vt_type?svt?lvt?ulvt? string "svt")
(Gate_Length_8?11? string "8")
(Bottom_Row_vss?vdd? string "vss")
(col_tap?none?left?right?both? string "none")
)

let(
(cv cell Fngr npoly nh Dev_VT PL Start tap col_tap Lib PC NC BR BL PR2 PR4 PR8 NR2 NR4 NR8 NTAP PTAP COL_TAP origX origY ppitch row_pitch rows coltap_h x y row_tap_wid)
cv=pcCellView

unless( cellId = ddGetObj( "LOCAL_LIB" "cellname" )
error( "Could not find cell %s." cell ) ; error, if cell not in library
)
when( cdfId = cdfGetBaseCellCDF( cellId )
cdfDeleteCDF( cdfId )
)

cellId=ddGetObj("LOCAL_LIB" "cellname")
cdfId=cdfCreateBaseCellCDF(cellId)

cdfCreateParam(cdfId
?name "Fingers"
?type "string"
?prompt "Fingers"
?defValue "2"
)
cdfCreateParam(cdfId
?name "Nrows"
?type "string"
?prompt "Number of Rows"
?defValue "2"
)
cdfCreateParam(cdfId
?name "Vt_type?svt?lvt?ulvt?"
?type "radio"
?prompt "VT type"
?choices list("SVT" "LVT" "ULVT")
?defValue "SVT"
)
cdfCreateParam(cdfId
?name "Gate_Length_8?11?"
?type "radio"
?prompt "Gate Length"
?choices list("8" "11")
?defValue "8"
)
cdfCreateParam(cdfId
?name "Bottom_Row_vss?vdd?"
?type "radio"
?prompt "Bottom Row"
?choices list("vss" "vdd")
?defValue "vss"
)
cdfCreateParam(cdfId
?name "col_tap?none?left?right?both?"
?type "radio"
?prompt "Column Tap"
?choices list("None" "Left" "Right" "Both")
?defValue "None"
)

<Body of the script>
]

Error while exporing the GDS:


*WARNING* (DB-270001): Pcell evaluation for LOCAL_LIB/cellname/layout has the following error(s):
*WARNING* (DB-270002): ("eval" 0 t nil ("*Error* eval: undefined function" cdfCreateBaseCellCDF))
ERROR (XSTRM-231): Pcell evaluation failed for 'LOCAL_LIB/cellname/layout' because the Pcell SKILL code contains either a syntax error or an unsupported XStream function. Check the standard output or the Virtuoso log file for more information. Cadence recommends correcting the Pcell SKILL code to resolve the issue. However, to ignore these errors and continue the translation, you may use the '-ignorePcellEvalFail' option.
INFO (XSTRM-273): Translation failed. '1' error(s) and '39' warning(s) found.
strmout completed.

  • Andrew Beckett

    It makes no sense to create the CDF within the PCell itself. This would mean that it recreates it every time the PCell evaluates (ie every variant) and that’s pointless (and a user would most likely not have the permissions either). In addition, the function won’t work in stream out anyway.

    The solution is to move the CDF creation part outside of the pcDefinePCell call. 

    Andrew 

  • GB20250109498
    in reply to Andrew Beckett

    Thanks Andrew, I moved the CDF creation outside the pcell, and its working absolutely fine. Slight smile

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