Re: existence_error gone mad...

Hello,

Strange. I have to dig into this. Unfortunately I can't do this
now. I keep you informed...

Daniel

Le 04/02/2017 à 16:16, emacstheviking a écrit :

It's gone mad I tell you!

uncaught exception:
error(existence_error(procedure,sdl_PollEvent/0),''/0)

{debug}

| ?- circletest.

circletest.

uncaught exception:
error(existence_error(procedure,sdl_CreateWindow/0),''/0)

sdl_PollEvent *works* if called from the prompt as
sdl_PollEvent(X) but when my program runs the above errors are
thrown out for some reason. I can call sdl_CreateWindow() from
the prompt and create a window just fine. My real question
is why does it think I am calling sdl_CreateWindow/0 when
there is no such predicate??

What has me stumped is that THERE ARE 0 ARITY predicates
with those names! According to the manual:

an existence error occurs when an object on which an operation
is to be
performed does not exist. ErrorTerm
has the following

form: existence_error(Object, Culprit) where
Object is the type of the
object and
Culprit the argument which
caused the error.
Object is one of:

- procedure

- source_sink

- stream

I now suspect there must be something wrong with the gplc / link
process although no errors are shown during the makefile build
process... sigh all I wanted to do was play with some graphics!

:(

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