Help on removing lines on a model

Hello all,

This is my first time posting. The problem I am having is when importing an IGES of a surface into Solidworks there is unwanted split line on the parts of the part. Therefore Ideally I would like to remove these lines to allow for a continuous surface.

I have tried the knit surface feature and the delete and fill feature but this didn't seem to work.

Many Thanks,

Adam

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SolidworksImport export