Code 71-210 xerox 128 pro - Xerox WorkCentre PRO 128 Copier

SOURCE: Can't print envelopes

Solution Title: How to print on COM10 envelops from the Bypass tray (PCL6) using a Windows 2000 O/S Resolution/
Solution Fixed! Did not fix. Resolution Role: Fix
Critical Message: The Envelope must be placed in the Bypass Tray face down (flap side up) and Long Edge IN. In Microsoft Word (Word 2000)

1. Under the Tools tab, select Envelopes and Labels.
2. Enter your Delivery and Return addresses.
3. Click on Options
4. Under Envelope Options; [Envelope size], select Size 10 (41/8 x 91/2 in)
5. Under Printing Options, select Portrait (LEF) - Long Edge Feed
   • As Feed from, select Tray 5 (Bypass)
6. Click <OK>

• Under the Paper/Output tab

• Job Type: Normal Print
• Paper Size: COM10
• Output Size: Same as Paper Size
• Image orientation: Portrait
• Image Rotation: OFF
• 2 sided Print: 1 sided Print
• Stapling: None
• Output destination: Center Output Tray
• Offset Stacking: None

• Under Tray/Layout

• Set Paper Source to Tray 5 (Bypass)
• Click on Bypass Tray Settings
  • Paper Type: Heavyweight (1 or 2)
  • Feed orientation: Portrait
• Click <OK>
• " on Specify Paper Type and select Heavyweight (1 or 2)
• " (Apply> and <OK>
• " <OK> again

SOURCE: I have Xerox workcentre pro

That is a software related error, You most likely need to reload the firmware, or replace the hard drive.
You can try disconnecting all the document feed and scanner cables then reseating them. Other than that, your looking at a software issue.