Re #23579 possible fix for Pearl tests

scripts/Diffraction/isis_powder/pearl_routines/pearl_algs.py

@@ -30,7 +30,19 @@ def apply_vanadium_absorb_corrections(van_ws, run_details, absorb_ws=None):
     if van_original_units != absorb_units:
         van_ws = mantid.ConvertUnits(InputWorkspace=van_ws, Target=absorb_units, OutputWorkspace=van_ws)
 
-    van_ws = mantid.RebinToWorkspace(WorkspaceToRebin=van_ws, WorkspaceToMatch=absorb_ws, OutputWorkspace=van_ws)
+    # ensure uniform binning across spectra
+    # extract the binning parameters from the first spectrum.
+    # there is probably a better way to calculate the binning parameters, but this
+    # gets the right answer.
+    xaxis = absorb_ws.readX(0)
+    params = []
+    for i, x in enumerate(xaxis):
+        params.append(x)
+        if i < len(xaxis) - 1:
+            params.append(xaxis[i + 1] - x)  # delta
+    van_ws = mantid.Rebin(InputWorkspace=van_ws, Params=params)
+
+    #van_ws = mantid.RebinToWorkspace(WorkspaceToRebin=van_ws, WorkspaceToMatch=absorb_ws, OutputWorkspace=van_ws)
     van_ws = mantid.Divide(LHSWorkspace=van_ws, RHSWorkspace=absorb_ws, OutputWorkspace=van_ws)
 
     if van_original_units != absorb_units: