[Plplot-general] Fortran input unit conflicts

[Spong, D. A. <sp...@or...>]

I recently upgraded to Plplot 5.11.0. If I use Plplot from within a Fortran 90 code that tries to open a formatted file and read from it, I get an error upon execution:

forrtl: severe (257): formatted I/O to unit open for unformatted transfers, unit 15, file /Users/dsp/fortran_code_development/taeflseab/MVanZeeland_ECH_2015/modeling_inputs_157737_t470.txt
Image              PC                Routine            Line        Source             
libplplotf95.12.d  0000000109393DDC  Unknown               Unknown  Unknown
xmvz-read          0000000109323889  Unknown               Unknown  Unknown
xmvz-read          0000000109320A4B  Unknown               Unknown  Unknown
xmvz-read          000000010932051E  Unknown               Unknown  Unknown

If I change the unit number from 15 to something else I still get the error. If I comment out the Plplot calls and compile without Plplot, the error goes away. It’s acting as if Plplot has occupied all available I/O units and declared them to be unformatted. How do I fix this?

- Thanks, Don