This is a list of runtime error code numbers returned by the LastError function and text error messages returned by the LastErrorMessage function.
| Error # | Error Description | |
| 1 | ERROR_NOSUCHLABEL | “No such label” |
| 2 | ERROR_FOR1 | “Illegal FOR – start number > end number” |
| 3 | ERROR_FOR2 | “Illegal FOR – start number < end number” |
| 4 | ERROR_NEXTNOFOR | “Next without FOR” |
| 5 | ERROR_FILENUMBER | “Invalid File Number” |
| 6 | ERROR_FILEOPEN | “Unable to open file” |
| 7 | ERROR_FILENOTOPEN | “File not open.” |
| 8 | ERROR_FILEWRITE | “Unable to write to file” |
| 9 | ERROR_FILERESET | “Unable to reset file” |
| 10 | ERROR_ARRAYSIZELARGE | “Array dimension too large” |
| 11 | ERROR_ARRAYSIZESMALL | “Array dimension too small” |
| 12 | ERROR_NOSUCHVARIABLE | “Unknown variable” |
| 13 | ERROR_NOTARRAY | “Not an array variable” |
| 14 | ERROR_NOTSTRINGARRAY | “Not a string array variable” |
| 15 | ERROR_ARRAYINDEX | “Array index out of bounds” |
| 16 | ERROR_STRNEGLEN | “Substring length less that zero” |
| 17 | ERROR_STRSTART | “Starting position less than zero” |
| 18 | ERROR_STREND | “String not long enough for given starting character” |
| 19 | ERROR_NONNUMERIC | “Non-numeric value in numeric expression” |
| 20 | ERROR_RGB | “RGB Color values must be in the range of 0 to 255.” |
| 21 | ERROR_PUTBITFORMAT | “String input to putbit incorrect.” |
| 22 | ERROR_POLYARRAY | “Argument not an array for poly()/stamp()“ |
| 23 | ERROR_POLYPOINTS | “Not enough points in array for poly()/stamp()“ |
| 24 | ERROR_IMAGEFILE | “Unable to load image file.” |
| 25 | ERROR_SPRITENUMBER | “Sprite number out of range.” |
| 26 | ERROR_SPRITENA | “Sprite has not been assigned.” |
| 27 | ERROR_SPRITESLICE | “Unable to slice image.” |
| 28 | ERROR_FOLDER | “Invalid directory name.” |
| 29 | ERROR_DECIMALMASK | “Decimal mask must be in the range of 0 to 15.” |
| 30 | ERROR_DBOPEN | “Unable to open SQLITE database.” |
| 31 | ERROR_DBQUERY | “Database query error (message follows).” |
| 32 | ERROR_DBNOTOPEN | “Database must be opened first.” |
| 33 | ERROR_DBCOLNO | “Column number out of range.” |
| 34 | ERROR_DBNOTSET | “Record set must be opened first.” |
| 35 | ERROR_EXTOPBAD | “Invalid Extended Op-code.” |
| 36 | ERROR_NETSOCK | “Error opening network socket.” |
| 37 | ERROR_NETHOST | “Error finding network host.” |
| 38 | ERROR_NETCONN | “Unable to connect to network host.” |
| 39 | ERROR_NETREAD | “Unable to read from network connection.” |
| 40 | ERROR_NETNONE | “Network connection has not been opened.” |
| 41 | ERROR_NETWRITE | “Unable to write to network connection.” |
| 42 | ERROR_NETSOCKOPT | “Unable to set network socket options.” |
| 43 | ERROR_NETBIND | “Unable to bind network socket.” |
| 44 | ERROR_NETACCEPT | “Unable to accept network connection.” |
| 45 | ERROR_NETSOCKNUMBER | “Invalid Socket Number” |
| 46 | ERROR_PERMISSION | “You do not have permission to use this statement/function.” |
| 47 | ERROR_IMAGESAVETYPE | “Invalid image save type.” |
| 48 | ERROR_ARGUMENTCOUNT | “Number of arguments passed does not match FUNCTION/SUBROUTINE definition.” |
| 49 | ERROR_MAXRECURSE | Maximum levels of recursion exceeded. |
| 50 | ERROR_DIVZERO | Division by zero. |
| 9999 | ERROR_NOTIMPLEMENTED | “Feature not implemented in this environment.” |
# test error trapping
onerror nicetrap
print 1
next haha
print 2
open 999, "bogus.file"
print "Runs Anyway"
# test error trapping off and fail at any error (default)
offerror
print 3
next hoho
print "never get here"
end
nicetrap:
# this is the nice error handler
print "trap and run - error on line " + lasterrorline + " - error number " + lasterror + " message " + lasterrormessage + " (" + lasterrorextra + ")"
return
will display
1 trap and run - error on line 4 - error number 4 message Next without FOR () 2 trap and run - error on line 6 - error number 5 message Invalid File Number () Runs Anyway 3 ERROR on line 12: Next without FOR