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I am trying to smoothen few polyline shapefiles using v.generalize in QGIS 3.4. But it's not working. Even i tried the same in QGIS 2.18. Getting the same error.

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Tried the same process in GRASS 7.4.2. The shapefile is not even getting loaded. When v.in.ogr is used, getting the exact "Unable to create table" error

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I've created another field with name "Strm_Od" instead of order and deleted the "order" field after copying the attributes. Now, v.generalize command is running without any issues. Issue might be with the column name i guess

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    Yes, "ORDER" is an SQL reserved word, so you can't use it as an attribute name. Same with the words "SELECT", "UPDATE" etc... – Micha Apr 30 at 18:42

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