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Subsections

- Chart Display
- Error Calling Unlink
- Error in Application

### ARCVIEW

#### Chart Display

The chart options of ARCVIEW are quite limited. Only 50 data points can be displayed within an X/Y plot used for the concentration profile. For this reason the profile might not display all stretches downstream from the selected stretch. To deal with this limitation GREAT-ER provides users with the Export Profile feature to write the complete stretch set to a file (either plain ASCII or dBase) for further analysis or more comfortable plotting with the user's favourite data plotting or spreadsheet application.

#### Error Calling Unlink

GREAT-ER combines the data needed for simulations from various tables (which is usual for GIS and databases in general). ARCVIEW, as the underlying database system, provides a complex sequential approach for this task. The mentioned error might occur (usually if a network is involved) as a result of timing problems while resolving these links (while editing a scenario). The error can not be prevented and it is recommended to close the scenario and GREAT-ER immediately.

#### Error in Application

Closing GREAT-ER and therefore ARCVIEW might lead to a cryptic error message caused by ARCVIEW. This is not an error of GREAT-ER but of ARCVIEW itself. It may also occur if you open ARCVIEW and leave it again without any further action.

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