append issue - model builder vs python

Hi,

I am trying to append a feature class from fgdb to sde geodatabase.

I created the model builder with append tool, everything working fine.. But after I export the same as python, while executing I am getting the following error.

Error 000732: Target Dataset: Dataset Database connections\schemaowner.sde\schemaowner.featureclass

does not exist or not supported.

Could you help me on this, since model builder is working, but the exported python throwing error, any other lines i have to add.

thanks.