Help regarding pop-push of a LIST

Hi Neeraj,

I can't test your code right now, but one thing that springs to mind is that plist is a function, and possibly a special variable... As I read your code I don't see anything that would cause plist to be undefined - it is declared in the let statement, so it should always have a value in that scope, at the very least it would be nil.

Try using a different name for the variable...

Hope this helps,

Lawrence. 

I'm guessing that your code cannot be what you've posted, because that works fine. There's nothing wrong with it (well, apart from you using the obsolete getCurrentWindow() rather than hiGetCurrentWindow() - but that shouldn't cause any problems).

Have you really loaded that version of the code? Or maybe your real code is more complicated than what you've posted?

Regards,

Andrew.

I was trying to upload the code from morning, but failed to upload... below is the code i am  working on

procedure(nvMyDirection()

let((xy1 xy2 x1 x2 y1 y2)

i=0

for(i 1 n

xy1=nth(i p_list)

xy2=nth((i+1) p_list)

x1=xCoord(xy1)

y1=yCoord(xy1)

x2=xCoord(xy2)

y2=yCoord(xy2)

if(x2-x1>0 && y2-y1 == 0 then print("RIGHT"))

if(x2-x1<0 && y2-y1 == 0 then print("LEFT"))  

if(y2-y1>0 && x2-x1 == 0 then print("TOP"))

if(y2-y1>0 && x2-x1 == 0 then print("BOTTOM"))

print(xy1)

print(xy2)

print(x1)

print(x2)

) ; for

) ; let

) ; procedure_nvMyDirection

procedure(nvGetMyLayer()

let((layer cur_layer)

layer=leGetEntryLayer()

cur_layer=append(cur_layer list(layer))

); let

); procedure_nvGetMyLayer

procedure(nvGetMyLocation()

n++

prog((p_curt p_list)

cvw=getCurrentWindow()

p_curt=hiGetPoint(cvw)

p_list=append(p_list list(p_curt))

print(p_curt)

print(p_list)

); let

); procedure_nvGetMyLocation 

Not clear what your problem is now - please elaborate. You have four separate functions there, which are variously referring to global variable. For example, nvGetLocation is referring to a variable n which would need to be defined. nvMyDirection is referring to global variable p_list (which is not the same as the variable p_list in nvGetMyLocation, since that is local to the prog() call within that function).

So what are you calling, and what is happening that is not what you expect?

Regards,

Andrew.

Yes, but what functions are you running? 

If you're calling nvGetMyLocation() (assuming you have a variable n defined), then p_list will be set within that function, but will be discarded (and hence no longer defined) after the prog() has finished. So if you're then trying to look at p_list in the CIW, it will be undefined - hardly surprising since it is a local variable. Similarly if you call nvMyDirection() it will be looking for a global variable p_list, which won't be defined. If it was, then it could compute local variables xy1, xy2, x1, x2 (which are defined in the let()), but these will be thrown away when the let() exits and hence when nvMyDirection exits. If you then call nvMyPath, it won't know what xy1 and xy2 are - plus the fact that the code is wrong in this function because the list of points is improperly specified.

So PLEASE explain what you're doing. Nobody can debug by reading your mind!

Regards,

Andrew.

Neeraj,

OK, but you still haven't said which functions you are calling, and in what order. In other words, the sequence of events that led to the error you saw.

Regards,

Andrew.