Error codes
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All functions return a value, which can either be the result from the function or an error code:

·0   No error  
·-10   Network not loaded  
·-11   RW Net trial license has expired  
·-12   Network too big for license or input file empty  
·-13   Invalid shapefile  
·-14   Too many links at one node (no more than 1900)  
·-15   Wrong version code in network file  
·-16   Function not available in turnmode  
·-17   CGF file is password protected  
·-18   Function only available in turnmode  
·-19   External ID not open - see externIDopen  
·-20   Field name not found in file  
·-21   Field isn't of type number/decimal 11.3  
·-22   Field is not numerical  
·-30   Number out of bounds  
·-31   Couldn't load network: wrong path, file not found etc  
·-32   File couldn't be found, opened, created etc.  
·-33   Node2 / link2 not found  
·-34   No node index created  
·-35   Route not ready  
·-36   Route index out of bounds  
·-37   No results calculated  
·-38   Nodes in subnet or node=0  
·-39   Function ExtraVarCreate hasn't been called  
·-40   General error  
·-41   Out of memory  
·-42   Internal error  
·-43   Function not available in Free/Standard version (OCX only)  
·-44   No spatial index found (spatialindex.bin)  
·-45   No link found  
·-46   No coordinate file found (coord3.bin)  
·-47   Not possible with encrypted files  
·-48   Road file is already open  
·-49   Road file is not open  
·-50   Cancelled by user  
·-51   Number of records in road file doesn't match network  
·-52   The network contains subnets  
·-53   (Not implemented yet)  
·-54   No solution found, increase factor in function CPP  
·-55   One or more nodes or locations are not defined in list  
·-56   Only shortest or fastest route can be processed with this function  
·-57   Function VRPcreate has not been called  
·-58   VRP solution not possible - limits too tight  
·-59   Isochrone steps too big - no output  
·-60   Limit files has wrong size  
·-61   Invalid ''lambda'' parameter  
·-62   Coordinate not within valid window  
·-63   Hierarchy need to be loaded  
·-64   Call SetLinkResult first  

See also function ErrorMsg.