Strange behaviour without DocMaximize()

[plazmon]

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.

[DPlotAdmin]

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.

[DPlotAdmin]

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

Code: Select all

integer NULL_POINTER(:)

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.

[plazmon]

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

Code: Select all

    Character, POINTER :: NULL_PTR
    NULLIFY(NULL_PTR)

and pass it to DPlot_Plot. After that everything work fine.

Thank you for you help!