Canon pro 4000 not printing the exact size as specified from Photoshop 24

[CKFineArt]

I have been having a problem with the printer not printing specific custom sizes for example, I want a print that is exactly 36"x36" but what I get is 36" wide and 35.5" long.  I have know idea how to correct it other than reconfiguring the size in Photoshop.  It has been time consuming and a huge waste of materials getting things corrected.

I have owned the printer for at least 6 years and never had this issue until the last year or so.  I print from Photoshop and it is the latest version.  

If anybody can offer up a solution I would sooo appreciate it.  CK

[Patrick]

Hi CKFineArt,

It is recommended that you contact technical support via phone for assistance. There is NO charge for this call. Please dial 1-800-423-2366, Monday-Friday 8:00 am to 8:00 pm Eastern Time, excluding holidays. A Technical Support Representative can determine the cause of the issue and resolve it for you quickly via phone.