inconsistent TablixHeader.Size in Report Builder 2

I get this nonsensical error seemingly randomly in Report 开发者_如何转开发Builder 2.0. Does anyone know why it comes up or how I can get rid of it?

The TablixRowHierarchy in tablix 'Tablix1' contains an inconsistent TablixHeader.Size in one or more of the TablixMembers that contain headers for TablixRow 2. TablixRow 2 has an expected total header size of 314.959993338585mm and an actual total header size of 314.960003936291mm. The total header size for each TablixRow created by the TablixRowHierarchy must be equal.

I found that I got this error when merging cells in a row in the grouped rows section. If you do not merge all the cells up to the data columns, you get this error. If you unmerge the cells, or merge all cells up to the data columns, the error dissapears.

You need to unmerge the cells in the top left of your tablix

I found a solution, I don't know why, it just works. Is not necessary to unmerge the cells. The error happens when you add a column inside a group. What you have to do is to resize each column on tablix to the size you want, but you should resize all of them. It should work.

Resizing columns work for me, I just resize few columns.