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-rw-r--r--src/gui_export.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/gui_export.c b/src/gui_export.c
index b0aef972..c0fbfd1c 100644
--- a/src/gui_export.c
+++ b/src/gui_export.c
@@ -284,8 +284,10 @@ gint export_sig(GtkWidget *widget, struct crystfelproject *proj)
/* Use the "FoM" cell file because there should only be one
* point of truth for the "final" cell parameters. Eventually, I hope
* to determine this automatically. */
- gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(win->cell_chooser),
- proj->fom_cell_filename);
+ if ( proj->fom_cell_filename != NULL ) {
+ gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(win->cell_chooser),
+ proj->fom_cell_filename);
+ }
gtk_box_pack_start(GTK_BOX(hbox), GTK_WIDGET(win->cell_chooser),
FALSE, FALSE, 4.0);