| Error Code | Error Code Value | Error Message |
| Runtime Errors | ||
| MEMLACK | 1 | Insufficient memory |
| ERROPEN | 2 | Error opening file |
| ERRREAD | 3 | Error reading file |
| ERRWRITE | 4 | Error writing file |
| ERRCLOSE | 5 | Error closing file |
| ERRPOS | 6 | Error positioning file pointer |
| ERRPOPEN | 7 | Error opening pipe (UNIX only) |
| ERRPCLOSE | 8 | Error closing pipe (UNIX only) |
| FILETOOBIG | 9 | Too many lines in file |
| KWDNOTFOUND | 10 | Keyword not found |
| ERRNAME | 11 | File could not be renamed |
| DL_LIBCOR | 12 | File or program has been corrupted |
| FL_NLIB | 13 | File is not a library file |
| FL_NUNLOCKED | 14 | File could not be unlocked |
| DL_LOCKED | 15 | Designer library is locked |
| DL_READONLY | 16 | Cannot edit a READONLY Designer library |
| Development Errors | ||
| BADWNSTRUC | 17 | Corrupted WINDOW structure |
| BADMFSTRUC | 18 | Corrupted MFILE structure |
| BADSCRSTRUC | 19 | Corrupted SCR structure |
| BADCLSTRUC | 20 | Corrupted CLIST structure |
| BADFMSTRUC | 21 | Corrupted FORM structure |
| BADMNSTRUC | 22 | Corrupted MENU structure |
| BADITEMSTRUC | 23 | Corrupted item structure |
| BADBGSTRUC | 24 | Corrupted background structure |
| WNBORDERLESS | 25 | Scroll bars can't be on borderless windows |
| WNISUP | 26 | Window is already up |
| WNNOTUP | 27 | Window is not up |
| WNNOTDIRECT | 28 | Window is not direct display |
| WNNOTPOPUP | 29 | Window is not a pop-up |
| WNTOOBIG | 30 | Window too big for the buffer |
| MFROWNEG | 31 | Memory file row is negative |
| MFROWTOOBIG | 32 | Memory file row number is too large |
| STRTOOLONG | 33 | String too long |
| FULLTABLE | 34 | Function table full |
| NOMFILEPTR | 35 | No MFILE pointer installed in window |
| NOETP | 36 | Event table pointer cannot be a NULLP |
| NOWNIMAGE | 37 | No window image saved |
| NOSUCHFLD | 38 | Field does not exist |
| NOSUCHITEM | 39 | No item with this number on form |
| BADPTR | 40 | NULLP is not allowed |
| BADPARM | 41 | Invalid parameter value |
| BADWNCOORD | 42 | Invalid window coordinates |
| BADLINECOORD | 43 | Invalid line coordinates |
| BADBOXCOORD | 44 | Invalid box coordinates |
| BADTEXTCOORD | 45 | Invalid text coordinates |
| BADFLDCOORD | 46 | Invalid field coordinates |
| BADPRPTCOORD | 47 | Invalid prompt coordinates |
| BADSRCOORD | 48 | Invalid scrollable region coordinates |
| BADMEMOCOORD | 49 | Invalid memo coordinates |
| BADMENUCOORD | 50 | Invalid menu coordinates |
| BADDATE | 51 | Invalid date string |
| BADTIME | 52 | Invalid time string |
| BADFORMAT | 53 | Invalid date/time format string |
| BADCLITEM | 54 | No item with this number in list |
| BADFMTYPE | 55 | Wrong type of form |
| BADPIC | 56 | Invalid picture |
| BADROW | 57 | Invalid row number |
| BADCOL | 58 | Invalid column number |
| FMISUP | 59 | Form is on screen |
| FMNOTUP | 60 | Form is not on screen |
| FMISREADY | 61 | Cannot add fields to ready forms |
| FMEMPTY | 62 | No active items on the form |
| NOTDFIELD | 63 | Data field expected |
| NOTMEMOFLD | 64 | Memo field expected |
| NOPICSYMFUNC | 65 | No picture symbol function |
| BADFLDTYPE | 66 | Illegal operation for this field type |
| NOSCROLLBAR | 67 | This window has no scroll bars |
| NORGSETFUNC | 68 | No range set function |
| FLDDISABLED | 69 | This field type has not been enabled |
| SROWNOTVIS | 70 | This scrollable row is not visible |
| DL_ACCERR | 71 | Invalid access code |
| DL_LOCKERR | 72 | Invalid value for lock status parameter |
| DR_KEYERR | 73 | Directory record key is null or invalid |
| FL_EOFILE | 74 | Unexpected end of file |
| FL_PRVLOCKED | 75 | File locked by a previous user |
| FL_NFOUND | 76 | File not found |
| DL_RCNTYPE | 77 | Current record is not the requested type |
| DR_PRVLOCKED | 78 | Directory record locked by a previous user |
| DR_CURLOCKED | 79 | Directory locked by the current user |
| DR_NFOUND | 80 | Directory record not found |
| DR_NLOCKED | 81 | Directory record is not locked |
| DL_EORECS | 82 | Last directory record has been read |
| DL_DATAERR | 83 | String data length is greater than maximum specified in table |
| FL_BADPATH | 84 | The specified drive/path does not exist |
| FL_NPERM | 85 | Insufficient privileges to access the requested Designer library |
| NOSUCHSR | 86 | Scrollable region does not exist |
| NOSUCHFUNC | 87 | Function name not in function list |
| FUNCNOTRES | 88 | Function pointers not resolved |
| DATANOTRES | 89 | Data pointers not resolved |
| CLISTNOTRES | 90 | Choice list not resolved |
| FMISNOTREADY | (error:) | Form is not ready
form READY |
| LIBNOTFOUND | 91 | Library name not found in linked list |
| MNOTRES | 92 | Sub-forms not resolved |
| FMNOTFOUND | 93 | Form name not found in form list |
| BADFLDOPT | 94 | Incompatible field options specified |
| DL_RECFORMAT | 95 | Library file has wrong VMS file format |
| INCOMPAT_FMT | 96 | Date/Time format incompatible with picture |
| NO_BROWSE | 97 | Browsing not enabled, include <vv_wnkt.h> in main |
| EVENT_OFLOW | 98 | Event queue overflowed. Number of events lost: |
| INVLBOXDATA | (error:) | Invalid initial data in list box |
| CLIP_FULL | (error:) | Clipboard is full |
| INVCLIPCHAR | (error:) | Invalid characters pasted into field |
