Fixed bug mm_tube not declared

Author: MiguelJulia

CHANGELOG

@@ -9,13 +9,15 @@ Protocol modifications:
 - Increased supernatant removal to 810 ul to remove all of it in protocol B.
 - Removed reuse of first tip in washes in protocol B.
 - Protocol B labware layout has now two possible configurations, a legacy one for the old version of the protocol without tips reuse and the new optimised one.
+- Protocol C does not mix master mix any longer if not prepared in the machine to avoid creating bubbles.
 
 Bug fixes:
 - Replaced default plate for biorad in protocol C.
 - Fixed tip tracking for the case where we have same p20 both multi-channel and single-channel in protocol C.
 - Fixed bug not transferring samples for exactly 8 samples with multi-channel in protocol C.
 - Fixed bug not changing trash for 48 samples exactly in protocol B.
 - Fixed bug added missing pick up tip for protocol C.
+- Fixed bug mm_tube not decalred in protocol C.
 
 ## Version 1.7
 

protocols/S3/stationC_protocol1_pcr_S3.ot2.apiv2.py

@@ -599,6 +599,8 @@ def run(ctx: protocol_api.ProtocolContext):
         mm_tube = prepare_mastermix(mm_rack, p300, p20,tips300,tips20)
         if TRANSFER_MASTERMIX:
             drop(p300)
+    else:
+        mm_tube = mm_rack.wells()[0]
 
     # transfer mastermix
     if TRANSFER_MASTERMIX: