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How to understand why MailStream Plus Standard letter Carrier Route presort with full CR5 trays is preparing bundles

ML TYP 3 L
CR5 trays are 5-digit carrier routes trays. 

Why is the presort showing bundles in full trays?
 
In the example below 724 pieces is a full 2 foot (T) tray:

 
     CR T-Tr 1        75023 CR5        724  C001..........72  C001..........72  C006..........95  C006..........95            724
                                            C042..........95  C042..........95  C056.........125  C056..........75
     CR T-Tr 2        75043 CR5        724  C010..........86  C010..........86  C028.........105  C028.........104           1448
                                            C069.........107  C069.........106  C079..........85  C079..........45
     CR T-Tr 3        75052 CR5        724  C049..........97  C049..........96  R001.........110  R001.........110           2172
                                            R004.........126  R018..........82  R018..........81  R027..........22

 
There is a message in the MSRPRPT:
 ***  WARNING  ***  DMM General ECR turned off because Auto-Compatible ECR is on
 
What this means, is MailStream Plus (MSP) always attempts DMM 245.6.7 Carrier Sort first.  But if you review position 18 of the ALG CR parameter, it has this –
NOTE: The DMM automation-compatible regulations are turned off if any of the following statements are true.
• The mailing contains some Carrier Route coded mail pieces without a ZIP + 4 Code.
• The mailing contains a non-machinable Piece ID.
• The mailing contains simplified addresses.
• The mailing contains mailpieces weighing over 3 ounces.

 
So then MSP does the presort using DMM 245.6.6 Carrier sort instead.  The MSRPRPT shows these counts –
  Carrier Coded Records                     82,002              100.00 % OF FORWARD
  Carrier Coded & ZIP+4 Records             81,990               99.99 % OF FORWARD

 
Some of the CRRT pieces did not have ZIP+4 codes. This is why MailStream Plus(MSP) switched to DMM  245.6.6.
 
Under DMM 245.6.7. b has –
5-digit carrier routes: required; no overflow, no bundling.
 
But under DMM 245.6.6. b –
 5-digit carrier routes: required if full tray, optional with minimum one 10-piece bundle.
 
There is not a ‘no bundling’ requirement.
If you look on the REPORT USPSQUAL report, this shows the DMM sections used -
Sort: Standard Mail 245.7.0 245.5.3 245.6.6 705.8.10.3
 
Bundles under 245.6.6 are allowed.
 
To presort using DMM 245.6.7, the job would need to make sure the make up in the input file does not include Carrier Route coded mail pieces without a ZIP + 4 Code for this particular input file. Then the presort would look like this:
     CR T-Tr 1        75023 CR5        724  724 Pcs, 14.48 Lbs, 0.47614 Cu Ft, 1.74966 Ft                                     724
     CR T-Tr 2        75043 CR5        724  724 Pcs, 14.48 Lbs, 0.47614 Cu Ft, 1.74966 Ft                                    1448
     CR T-Tr 3        75052 CR5        724  724 Pcs, 14.48 Lbs, 0.47614 Cu Ft, 1.74966 Ft                                    2172
UPDATED:  April 17, 2017