I am using QGIS Grass v.extrude tool for extrusion but it giving me this error (the bold text is error).

scale Scale factor sampled raster values default: 1.0 null_value
Height for sampled raster NULL values 
**ERROR: Sorry <TER_8> is not a
valid option** C:\Users\User\Documents>v.out.ogr type="auto"
format="GPKG" --overwrite **ERROR: Vector map
<output5c4e838e8af54c7dae5ee537994bc46a> not found**
C:\Users\User\Documents>exit Execution of
finished. Cleaning up default sqlite database ... Cleaning up
temporary files... Press any key to continue . . . Execution completed
in 13.72 seconds Results: {'output':
<QgsProcessingOutputLayerDefinition {'sink':TEMPORARY_OUTPUT,
'createOptions': {'fileEncoding': 'System'}}>}

Loading resulting layers

**The following layers were not correctly generated.<ul><li>C:/Users/User/AppData/Local/Temp/processing_f5800465ab8f4b9b8866d34ee24c0249/d26f9377bcd8450582d55381695f5de2/output.gpkg</li></ul>You
can check the 'Log Messages Panel' in QGIS main window to find more
information about the execution of the algorithm**.
  • 1
    The real error is "ERROR: Sorry <TER_8> is not a valid option" - did you set TER_8 anywhere? – markusN Oct 20 '19 at 18:37
  • Ter_8 is a column which i got through the join. – Muhammad Faizan Khan Oct 24 '19 at 5:28
  • I have changed its name (column Name) to Heights but now i am getting this error. WARNING: Invalid layer number (-1). Parameter 'height_column', 'cats' or 'where' specified, assuming layer '1'. ERROR: Column <Heights> does not exist – Muhammad Faizan Khan Oct 24 '19 at 5:35

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