gfitsio.lvlib:gfitsio-check-valid-refnum.vi

Returns TRUE if gftis refnum is invalid. Use this function to make sure a reference to a file still resides in system memory and was not closed.


Connector Pane

gfitsio.lvlib:gfitsio-check-valid-refnum.vi


Controls and Indicators

cdlrn

gftis refnum

ibool

invalid refnum?