vpwl problem using spectre with ocean script

[william_luo]

Hi all,

I had a problem when I did a simulation with Ocean Script. I designed a circuit by virtuoso and extracted the spectre netlist, then I remove some vsource statements in this netlist and make some new stimulus files as input variables containing new vsource statements. By using vpulse in this way, I can get good result. But when vpwl was used, I always got error.

the vpulse statements are all like below and works well:

V0 (net6 0) vsource type=pulse dc=1.800000e+00 val0=0 val1=1.800000e+00 period=28n delay=14n rise=100p fall=100p width=14n

the vpwl statements are all like below:

V0 (net6 0) vsource type=pwl wave=\[ 0 0 100n 0 ]

I used these two kinds of generator to the same circuit. It is weird that vpulse works well and vpwl can't work.

----the error message when vpwl is used:

ERROR (SFE-1025): "/homes/cadence/lab2/spi/tb_1.txt" 131:
Instance `V0': Unexpected value `0' - all required positional
parameters have already been specified.
ERROR (SFE-1025): "/homes/cadence/lab2/spi/tb_1.txt" 131:
Instance `V0': Unexpected value `0' - all required positional
parameters have already been specified.
ERROR (SFE-1025): "/homes/cadence/lab2/spi/tb_1.txt" 131:
Instance `V0': Unexpected value `1e-07' - all required positional
parameters have already been specified.
ERROR (SFE-1025): "/homes/cadence/lab2/spi/tb_1.txt" 131:
Instance `V0': Unexpected value `0' - all required positional
parameters have already been specified.
---------------------------

I checked all the code but didn't know the reason. I already delete the old vsource statements in the netlist but the ocean always show the message "have already been specified".

Can someone help me ? Thanks in advance.

Regards,
Wayne,