I'm getting this error when i wanted to delete all objects i've loaded.
Here's the code:



What is this?

Thanks..

Object number Illegal means you've tried to delete/check/move whatever an object with the number 0, the code you've posted is fine so the error must be elsewhere.

Thanks dark coder.
But it highlights that line;

As for deleting the objects, have you tried "DELETE OBJECTS 1,10000" instead? That's much faster and you can get rid of all objects with a single command.

Oh, i didn't know that thanks a lot.

but to answer your question its becuase of this:


instead of



that would be my guess

for count=1 to 10000
if object exist(count) = 1 then delete object count
if image exist(count) = 1 then delete image count
next count



that would be my guess

No, his code is valid. 'If Variable' will execute the statement as long as Variable isn't 0.

Yeah there's no problem with if statement...

wow thats crazy i never knew that... so your saying that


is the same as


??

Yes, the equals sign is an operator, just like the plus sign is. It takes what is on the left, compares it with what is on the right, and gives a result of 0 if they differ, or 1 if they are the same value.

The IF command will take the 'true' path if the value is non-zero, and the 'false' path if the value is zero. WHILE...ENDWHILE and REPEAT...UNTIL operate in the same way.

Here's a simple example showing that '=' is 'just another operator':

Suicidal Sledder:

It's called an 'implied condition'. If you don't use a boolean operator like =, <, >, or <> which tests for a True or False result then testing for a True result is 'implied' (assumed).

TDK_Man

Also, the implied condition is only not false, which includes anything that is not zero. True, by definition is really only 1, but anything that is not 0 evaluates to true. In the case of mouseclick, it is not a boolean, and coding like the first snippet is quite buggy, to say the least.

I have more trouble with using if/then...it is asking for logic errors, imo, and you usually wind up needing a block anyway. Same goes for using the ':'.

Also, I have seen the implied condition fail, especially when you try to evaluate multiple conditions. I have found that if you make it completely obvious to the compiler, it makes the correct code. That is why I don't use the shortcut logic in DBPro. In C/C++, it causes subtle side-effects that usually are very difficult to track down and eradicate.

And after all that we still don't know why bandM is getting the error.

I favour dark coder's answer - the error messages don't always point at the correct line.

It's just possible there is an invisible character in the line. Have you tried pasting those lines into a file of their own and running it? What happens then? It should just compile and run.

And after all that we still don't know why bandM is getting the error.

Yes.
But it's gone!!I did no change,nothing and it's gone when i recompiled whole project.