B787 flight crew reported minimum equipment list message during takeoff roll.

Attributes
ACN	1681635
Time
Date	201909
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 122 Flight Crew Total 5323 Flight Crew Type 1721
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 21000 Flight Crew Type 2067
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural MEL Deviation - Procedural Published Material / Policy

Narrative:

Aircraft was dispatched with MEL 'ram air fan primary control inop.' during the takeoff roll a maintenance message was auto sent to [maintenance control] causing a break in the [maintenance release.] the printer spit out the message do not take off then stating the reason for the message. 'Item: ram fan primary right ram fan will operate in a degraded mode on the ground from motor controller failure or contact failure.' when the message came we were already passing 100 kts so the takeoff was continued. Once we reached altitude we contacted dispatch and [maintenance control] and were informed that yes indeed the [maintenance release] had been broken. I inquired as to why a system on a maintenance deferral would trigger an auto report and was inform there is a glitch in the system. If that is the case that needs to be addressed as it puts us in legal jeopardy.

Original NASA ASRS Text

Title: B787 flight crew reported Minimum Equipment List message during takeoff roll.

Narrative: Aircraft was dispatched with MEL 'Ram Air Fan Primary Control inop.' During the takeoff roll a Maintenance message was auto sent to [Maintenance Control] causing a break in the [Maintenance Release.] The printer spit out the message DO NOT TAKE OFF then stating the reason for the message. 'Item: Ram fan primary R ram fan will operate in a degraded mode on the ground from motor controller failure or contact failure.' When the message came we were already passing 100 kts so the takeoff was continued. Once we reached altitude we contacted Dispatch and [Maintenance Control] and were informed that yes indeed the [Maintenance Release] had been broken. I inquired as to why a system on a Maintenance deferral would trigger an auto report and was inform there is a glitch in the system. If that is the case that needs to be addressed as it puts us in legal jeopardy.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.