Not able to create multiple column on the fly grid using Groovy

We are trying to create a groovy rule that can delete the whole rows where there is no data on OWP_Status and OWP_Start Date column, for that we are creating a on the fly grid using builder.addColumn, builder.setPov and builder.addRow api, but it is only works for single column member, is there any limitation of adding column as We ran into a issue where there is no data in OWP_status column then it suppress the whole column as we have included suppression on block. We want to include more than one column so that at least one member has data