Topic: Error PPF on formatting a list

[Giuseppe Beatrice]

Good morning to all.
I have had a problem on formatting a subfunction containing that simple alist:
(setq altc@ '(("TRIFASE CON NEUTRO" "3F+N" "L1-L2-L3-N" 3 4) ("TRIFASE" "3F" "L1-L2-L3" 3 3) ("MONOFASE" "F+N" "L-N" 1 2)))
In response, Visual Lisp responds with a message of error ending with the phrase... "PPF internal: non-plain"
The error doesn't appair if I format the alist as here:
(setq altc@ (list ("TRIFASE CON NEUTRO" "3F+N" "L1-L2-L3-N" 3 4) ("TRIFASE" "3F" "L1-L2-L3" 3 3) ("MONOFASE" "F+N" "L-N" 1 2)))
Can you explain me the reason of this behavior?

[Tharwat]

Your first list construction is correct but the second proposal one is incorrect and it could be as follows:

Code - Auto/Visual Lisp: [Select]

1. (setq altc@ (list (list "TRIFASE CON NEUTRO" "3F+N" "L1-L2-L3-N" 3 4) (list "TRIFASE" "3F" "L1-L2-L3" 3 3) (list "MONOFASE" "F+N" "L-N" 1 2)))
2.  

How did you iterate through the list which happen to throw that error?

[VovKa]

Can you explain me the reason of this behavior?

it's a bug
as i remember correctly i had to change '(...) to (quote (...))

[Lee Mac]

There's another thread here somewhere which discusses this particular bug, I think it may be similar to this.

[Giuseppe Beatrice]

Thank you all.
Tharwat: it's true, it was my mistake in transcribing the list in the second way
Lee Mac: the list is built correctly with both instructions, the error occurs when I run a formatting command, while in the thread mentioned the list was not accepted
Vovka: the same happens to me too, so I'm fully convinced it's a bug

[Giuseppe Beatrice]

I have noted that's a question of total length if the list: in my case total length of instruction on a row
(setq altc@ '(("TRIFASE CON NEUTRO" "3F+N" "L1-L2-L3-N" 3 4) ("TRIFASE" "3F" "L1-L2-L3" 3 3) ("MONOFASE" "F+N" "L-N" 1 2)))
is 122; if I reduce the length to 115 formatting was positive.
This is all for the sake of completeness