All methods in the GX API require the user to have been granted the right to access that method in the way it is being used by your program. The entitlements of the end-user are checked when a GX (or external program) calls a GX function. Each function will fall under one of the license classes below:

Type	Description
Public	Available with the free *Viewer, and the GX Developer* redistributable libraries. No entitlements are needed to access these classes and methods. Note, that some of the methods that are public may have reduced functionality. For example, any size database can be read, but there are restrictions in the size of data that can be written to a Public license user.
Controlled	These methods require Oasis montaj to be installed with the Geosoft license installed for the end-user use the method. The GX_GEOSOFT_BIN_PATH environment variable, if defined, must point to the '`...\Oasis montaj\bin`' directory.
Extended	These methods require specific licenses to execute. Since the license structure that enables these methods is dynamic it is recommended that GX Developers not use Extended methods.

A user that runs a GX or program that includes calls to method calls for which she is not entitled will receive an error like:

geosoft.GX.Error:
Unable to bind the "?rGet_PG@@YANPAUh_gxx@@PBJ11@Z" wrapper function.
The DLL may not be present or a license may be missing.

Well written programs or GXs should catch this error and report the problem to the user with a recommended course of action.

VIEWGX - Entitlement/License Analysis

To help GX developers determine the entitlement requirements for their GX to execute, the VIEWGX program can provide a license analysis of a GX. To view this analysis run:

VIEWGX –l MyGX.GX

This will produce a listing of licenses under which this GX can be used. For example:

This GX will execute with the following licenses:
 
 10000 Oasis montaj Mapping and Processing System
 10100 montaj Geophysics
 10101 montaj Chimera Geochemistry
 10102 montaj Drillhole Plotting
 10103 montaj Induced Polarization
 10104 montaj Geophysics Leveling
 10105 montaj MAGMAP Filtering
 10106 montaj Grav/Mag Interpretation
 10107 montaj Airborne Quality Control
 10108 montaj 256-Channel Radiometric Processing
 10109 montaj Gravity and Terrain Correction
 10110 montaj Gridknit
 10111 montaj UX-Detect
 10200 montaj DAP Administrator
 10500 montaj plus Modeling Lite
 10520 montaj plus GMSYS Basic Profile Modeling
 10521 montaj plus GMSYS Intermediate Profile Modeling
 10522 montaj plus GMSYS Advanced Profile Modeling
 10523 montaj plus Modeling 3D
 10524 montaj plus Depth To Basement
 10525 montaj plus Isostatic Residual
 10540 montaj plus Grav/Mag Filtering
 10541 montaj plus Compudrape
 30000 Target Surface and Drillhole Mapping
 30101 Target Chimera Geochemical QA and Analysis

If a more detailed analysis is required, the –L options can be used to produce output as follows:

This GX will execute with the following licenses:
 
 0 Public License
 
   missing Wrapper [Create_BIGRID] Marble
   missing Wrapper [Destroy_BIGRID] Marble
   missing Wrapper [iLoadParms_BIGRID] Marble
   missing Wrapper [Run_BIGRID] Marble
 
 10000 Oasis montaj Mapping and Processing System 
   OK
 
 10100 montaj Geophysics 
   OK 
 10101 montaj Chimera Geochemistry
   OK
 
 10102 montaj Drillhole Plotting 
   OK
 
 10103 montaj Induced Polarization
   OK
 
 10104 montaj Geophysics Leveling 
   OK
 
 10105 montaj MAGMAP Filtering 
   OK
 
 10106 montaj Grav/Mag Interpretation 
   OK
 
 10107 montaj Airborne Quality Control 
   OK
 
 10108 montaj 256-Channel Radiometric Processing
   OK
 
 10109 montaj Gravity and Terrain Correction
 
   OK
 
 10110 montaj Gridknit
 
   OK
 
 10111 montaj UX-Detect 
   OK
 
 10200 montaj DAP Administrator
   OK
 
 10500 montaj plus Modeling Lite
   OK
 
 10520 montaj plus GMSYS Basic Profile Modeling 
   OK
 
 10521 montaj plus GMSYS Intermediate Profile Modeling
 
   OK
 
 10522 montaj plus GMSYS Advanced Profile Modeling
 
   OK
 
 10523 montaj plus Modeling 3D
 
   OK
 
 10524 montaj plus Depth To Basement 
   OK
 
 10525 montaj plus Isostatic Residual
   OK
 
 10540 montaj plus Grav/Mag Filtering
 
   OK
 
 10541 montaj plus Compudrape 
   OK
 
 30000 Target Surface and Drillhole Mapping 
   OK
 
 30101 Target Chimera Geochemical QA and Analysis 
   OK

Each general license supported by Geosoft will be listed along with either “OK” or the reasons this GX will not execute under this license. This program can be very useful in determining what licenses will be required to run your GX. Note that the license tables can and do change between versions so the 6.0 version of VIEWGX is only accurate for the 6.0 version.

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