Nexus: Add check for failure to properly call qmcpack executable

nexus/nexus/qmcpack.py

@@ -1151,10 +1151,10 @@ def check_sim_status(self):
         errors = self.errfile_text()
 
         ran_to_end  = 'Total Execution' in output
+        run_started = 'QMCPACK' in output
         aborted     = 'Fatal Error' in errors
         files_exist = True
         cusp_run    = False
-
         if not self.has_generic_input():
             if not isinstance(self.input,TracedQmcpackInput):
                 cusp_run = self.input.cusp_correction()
@@ -1186,9 +1186,11 @@ def check_sim_status(self):
             #end if
         #end if
 
+        if not run_started:
+            self.warn("QMCPACK did not start properly!\n")
 
         self.succeeded = ran_to_end
-        self.failed    = aborted
+        self.failed    = aborted or not run_started
         self.finished  = files_exist and (self.job.finished or ran_to_end) and not aborted 
 
         if cusp_run and files_exist:

nexus/nexus/qmcpack_analyzer.py

@@ -220,8 +220,12 @@ def __init__(self,arg0=None,**kwargs):
             ghost_atoms(*ghosts)
         #end if
 
-        if isinstance(arg0,Simulation):
+        if isinstance(arg0, Simulation):
             sim = arg0
+            if sim.failed:
+                self.warn("Simulation failed, skipping analysis!")
+                self.info.analyzed = sim.failed
+
             if 'analysis_request' in sim:
                 request = sim.analysis_request.copy()
             else:

nexus/nexus/tests/test_qmcpack_simulation.py

@@ -401,7 +401,10 @@ def test_check_sim_status():
     assert(not sim.failed)
 
     outfile = os.path.join(tpath,sim.outfile)
-    out_text = 'Total Execution'
+    out_text = (
+        'QMCPACK\n'
+        'Total Execution'
+    )
     out = open(outfile,'w')
     out.write(out_text)
     out.close()