From e18c025df6f5d8e2ecd0b0ac2b827e657fb53415 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Wed, 18 Oct 2017 11:58:50 +0200
Subject: Check that dirax,felix,mosflm or xds are available at the start

Avoids a confusing error message later.
---
 libcrystfel/src/dirax.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libcrystfel/src/dirax.c')

diff --git a/libcrystfel/src/dirax.c b/libcrystfel/src/dirax.c
index 1dacd021..488eb7db 100644
--- a/libcrystfel/src/dirax.c
+++ b/libcrystfel/src/dirax.c
@@ -604,6 +604,12 @@ void *dirax_prepare(IndexingMethod *indm, UnitCell *cell)
 {
 	struct dirax_private *dp;
 
+	if ( dirax_probe(cell) == NULL ) {
+		ERROR("DirAx does not appear to run properly.\n");
+		ERROR("Please check your DirAx installation.\n");
+		return NULL;
+	}
+
 	/* Flags that DirAx knows about */
 	*indm &= INDEXING_METHOD_MASK;
 
-- 
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