diff --git a/Packages/MIES/MIES_MiesUtilities.ipf b/Packages/MIES/MIES_MiesUtilities.ipf
index d838d12124..bedee73e6e 100644
--- a/Packages/MIES/MIES_MiesUtilities.ipf
+++ b/Packages/MIES/MIES_MiesUtilities.ipf
@@ -5879,7 +5879,12 @@ threadsafe Function SplitSweepIntoComponents(numericalValues, sweep, sweepWave,
 			endif
 		endif
 
-		MoveWave data, targetDFR:$str
+		// @todo workaround IP bug #4702 where MoveWave fails in preemptive threads
+		if(MU_RunningInMainThread())
+			MoveWave data, targetDFR:$str
+		else
+			Duplicate data, targetDFR:$str
+		endif
 	endfor
 
 	string/G targetDFR:note = note(sweepWave)