[Ngspice-users] strange error: no such vector

[Rudolf S. <rud...@gm...>]

Dear list,


I have a control section like (simplified)

.control
let a = 1e3
alter R4 $&a
* tran 10n 10u 1u
let a =  a + 1e3
echo $&a
.endc

and this works ok, ie, with no error.
If I uncomment the 'tran' line, I get

Error(parse.c--checkvalid): a: no such vector.
Error: RHS "a + 1e3" invalid
Error: &a: no such variable.

I do not understand why.
Thanks for any comments.


Best regards,
Ruda