ALERTING MESSAGE  CAUSE  CORRECTIVE ACTION 
VERIFY RNP  U7.3, U7.4, U7.5, U8.3 – U10.2A: Underlying RNP value is less than manually entered value or a GPS approach has been selected and the default RNP is active (no crew entered or leg specified RNP active). U7.1, U7.2, U8.0, U8.1, or U10.3 and later: Underlying RNP value is less than manually entered value.  Enter appropriate RNP. 
VERIFY TAKEOFF SPEEDS  A PERF INIT change has been made after takeoff speeds were specified.  Enter new takeoff speeds. 
VERIFY VERT RNP  U10.5 and later: During an active descent with CDS LNAV/VNAV deviation scales enabled, a manually entered vertical RNP is greater than the default vertical RNP.  Clear CDU message. Enter appropriate vertical RNP. 
VNAV DISCONNECT  The criteria for VNAV engagement is not satisfied (VNAV disengages). U10.4 and later: On approach, with VNAV engaged, the FCC has switched to LVL CHG.  Manually control the vertical path. 

Copyright . The Boeing Company. See title page for details.
11.60.10  June 4, 2004

Flight Management, Navigation -FMC/CDU Messages 737 Operations Manual
FMC Entry Error Messages
These messages relate to incorrect scratch pad entries. FMC entry error messages:
.  
are shown in the CDU scratchpad

.  
illuminate the message light (MSG) of the CDU where the entry error was
made

.  
temporarily overwrite data in the scratchpad.

Use the CLR key or key in new data to remove the message. If the CLR key is used to remove the message, the data previously entered is once again displayed. If new data is keyed in over the message, the message and the data previously entered are removed.
ENTRY ERROR MESSAGE  CAUSE  CORRECTIVE ACTION 
ALT CONSTRAINT XXXXX (waypoint identifier)  A flight plan modification has caused an altitude conflict with a waypoint that has an altitude constraint.  Clear the message and revise the entry. 
DATA BASE FULL  Entry attempted into a supplemental or temporary navigation database category which is full.  Go to the NAV DATA pages and delete unneeded waypoints, navaids, or airports from the appropriate database and re-attempt entry. 
DUPLICATE FLIGHT PLAN ID  U10.3 and later: The entry attempted is a duplicate of an existing supplemental flight plan name.  Clear the message and select a unique flight plan name. 
INVALID DELETE  DEL key operation was attempted for a data line to which it was not applicable.  Clear the message and select the proper line after the DEL key is pressed. 
INVALID ENTRY  Attempted data entry has incorrect format, range, etc. for the selected data line. Entered RTA waypoint is not in the flight plan.  Clear the message and scratch pad entry, and repeat the entry with the correct data. 
INVALID QUAD  U10.2 and later: Attempted HOLD page QUAD entry has incorrect format or range.  Clear the message and revise the QUAD entry. 

Copyright . The Boeing Company. See title page for details.
June 4, 2004   11.60.11
Flight Management, Navigation -FMC/CDU Messages 737 Operations Manual

ENTRY ERROR MESSAGE  CAUSE  CORRECTIVE ACTION 
NO OFFSET AT LEG XXXXX (waypoint)  Attempted entry of a lateral offset start or end waypoint XXXXXX that is not offsetable (lateral offset as installed).  Clear the message and amend the route. 
NOT IN DATA BASE  FMC does not contain the required data for the entered identifier.  Clear the message and check data entry, or enter the required information into the supplemental or temporary navigation database via the NAV DATA pages. 
NOT IN FLIGHT PLAN  RTA waypoint or lateral offset (as installed) start/end waypoint entry is not in active flight plan.  Clear the message and amend the entry. 
ROUTE FULL  Entry of more than maximum allowed number of waypoints or holding patterns attempted.  Clear the message and review existing and desired waypoints and holding patterns for possible deletion. 
SUPP RTE DATA BASE FULL  U10.3 and later: Attempted save of the 11th supplemental flight plan.  Clear the message, delete unneeded supplemental flight plans and re-attempt entry. 

Copyright . The Boeing Company. See title page for details.
11.60.12  June 4, 2004

Flight Management, Navigation -FMC/CDU Messages 737 Operations Manual
FMC Advisory Messages
These messages relate to FMC status. FMC advisory messages:
.
are shown in the CDU scratchpad

.
illuminate message lights (MSG) on both CDUs. Use the CLR key or correct the condition responsible for the message to remove the message. The message is temporarily removed from the scratchpad when
　
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