Issue:

Import Mesh block displays the message "Stream error" when trying to open an STL file.

Applies to:

• nTop 2.22.7
• ASCII STL

Cause:

This error occurs if an STL was created using an ASCII representation, and the Header exceeds 100 characters.

Solution:

1. Make a copy of the STL as a backup.
2. Right-click the STL file and select Open with > Notepad
3. On the first line, after the word "solid," eliminate some text until the Header contains fewer than 100 characters.
4. Click File > Save

More on this topic:

• How to export an STL
• nTop Platform Troubleshooting Guide
• What file types can nTop import and export?