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Bulk E-File Error Codes

If you have received an error code in Michigan Treasury Online (MTO), enter it into the search bar below to receive an explanation of the error.

Error Codes

Error Code Explanation of Error
B5010 The file you are trying to upload is too small to include a wage record or is empty.
B5020 The system is unable to upload a file name that exceeds 20 character limit, or contains special characters or spaces.
B5030 The system is unable to upload the file. This file must be a ".zip" file and it must contain only one ".xml" file.
B5040 The file size you are trying to upload is too large. The system is unable to upload a single file larger than 10MB. Try reducing the size by splitting data into multiple files. You can save and upload multiple files.
B5050 The system is unable to upload the file. The system's security is compromised due to a virus/malware that has been identified in the file.
B5060 There was an unexpected error received while attempting to upload your file. Please submit your request again. If you continue to receive the message see "Troubleshooting MTO Error Messages" below.
B5070 An unexpected error occurred during file upload. Please submit your request again. If you continue to receive this message, see "Troubleshooting MTO Error Messages" below.
B5080 An unexpected error occurred during file upload. Please submit your request again. If you continue to receive this message, see "Troubleshooting MTO Error Messages" below.
B5090 An unexpected error occurred during file upload. Please submit your request again. If you continue to receive this message, see "Troubleshooting MTO Error Messages" below.
B5100 Based on the search criteria entered we are unable to locate an acknowledgement. Please change the search criteria and submit your request again. If you continue to receive the message see "Troubleshooting MTO Error Messages" below.
B5110 The system is unable to generate an acknowledgment file for viewing or downloading based on the size of the file. To access the acknowledgement file click on the confirmation number on the history tab.
B5120 Unable to retrieve Bulk File Transmission History data. Please submit your request again. If you continue to receive this message, see "Troubleshooting MTO Error Messages" below.
B5130 Unable to retrieve acknowledgments. Please submit your request again or change search criteria. If you continue to receive this message, see "Troubleshooting MTO Error Messages" below.

Troubleshooting MTO Error Messages

If you repeatedly receive an MTO error message, complete all of the following steps. Be sure to reattempt your MTO transaction after each step:

  • Verify you are using an MTO supported web browser: Chrome, Edge, Firefox, Safari, Samsung Internet
  • Log out of the MTO session and exit the browser completely
  • Shutdown computer and restart
  • Clear browser cache
  • Switch web browsers and/or computers if possible

If you continue to receive the error message after completing the steps referenced above, please contact the Treasury Customer Service Center during normal business hours (Monday - Friday, 8 am - 4:30 pm EST):

  • ESA: 517-241-0310
  • Registration and SUW: 517-636-6925