# Troubleshooting

Troubleshooting information is provided below under a series of headings. You can search this list by using 'Find in Page' menu options in Internet Explorer and Netscape

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Installation

- After starting Viewer or Moscow two windows come up but they are both blank (black)

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Viewer

### Main Menu Window

### Plan Window

### Surface Window

- Black window/bars
- Program crashes while manipulating a surface (with a floating point error)

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Moscow

- Menu items 'Input DXF' or 'run SIBERIA' do not work

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Virtual Earthworks