I met a problem that
even max/msp or pd when we create a patch,
some errors could not shown in console,
or maybe there's no error but we just could not make the right thing.

for example if I send one rendering 3d obj model to a window and also a quicktime movie to the same window,there maybe just show nother or just one thing, (it is just a assumption, i mean some errors like that take me the same feeling. )

I dont know if the problem is caused by that one is replaced by another , or the two all in the window but just because there are two layers one is covered another or that is just need a plane to texture on.

it is hard to let us know what i am doing wrong in the patch, because, it looks like I dont know the basic rules, that is pretty true,
but for us newbie, one way to learn it is reading lots of basic theory , and another is practice, during that we rush on a wall , we could not handle it, and cont find the root .

that is some of my feeling about media tools like pd max/msp and so on .

is there a better way to debug ? if no could pd's offical team think about that ?

thanx a lot

Sincerely andm

If at first you don't succeed, dust yourself off and try again.

Of course, I will check the help documentation, reference, and also tutorial.
and here which I piont out, is a data tracking problems, I think it could better for showing something to prompt us when data changes.

may because I dont know how to do that, there maybe a pd function(way) to solve it.

and like C or other program language, even Adobe Action Script , I feel that is better this part.

if there is no error reports in console,
but the result is not what you want,
how could u do ?

What you are describing is not an "error", which is why there is no error reported. It is simply not the result you were looking for.

What is it that is in Max/MSP, C, etc that you are missing from Pd?

Unless you are sending the wrong type of data to an object, or an object has failed to create, or there is a system error, you will not get errors in the console. If you are trying to monitor what numbers are being sent to a given object, use gui number boxes or [print] objects to monitor the flow of data.

In the example with the 3d object and quicktime movie:

Try changing the depth of each layer using [translateXYZ] or the render order by changing the creation argument on each of the [gemhead] objects (larger numbers render later than smaller numbers).

The way you should approach debugging really depends on what your specific problem is...