DPlot

If use first DPlot_plot without command DocMaximize DplotJr behave very strange.
1. It don't show any curves only axis and grid lines, but when switch grid lines or/and box options the curves appear.
2. AddData don't add any data and return undocumented error code: -16393

If use DocMaximize everything work fine.

That error code is meaningless to me, so I'm not sure what's going on here. If you can send me your application I'm sure that would be helpful.

Andrew,
I'm not sure of the exact source of that error message but will at the very least track that down and either 1) return a meaningful documented error code or 2) prevent the problem that is causing it, which is not the missing [DocMaximize()] but a bad command string. You're sending a char(0), which tells DPlot_Plot that there is a command string, but it isn't set up to handle a string of 0 length. If you add any command or instead send a null pointer in place of that string, your code will work.

Not sure which FORTRAN compiler you're using, but with WATCOM you can do this by sending a NULL_POINTER, where NULL_POINTER is declared as
But none of this will be necessary after the next release. I'll make sure that DPlot_Plot and similar functions check for a 0-length string and ignore it in that case.

Hi David!

Yes, the problem is due to incorrect command which I send to DPlot_Plot.

I'm using Intel Fortran. I declare NULL_PTR as and pass it to DPlot_Plot. After that everything work fine.

Thank you for you help!