Maps in SSRS 2008

Yesterday I was getting an error while trying to run a report that contains a map, saying something like this: [...]maps binding or grouping for layer is not valid[...]. I don't remember exactly the entire error message, but I can reproduce it if one is interested.

This was a little tricky because I started to look at the map layer properties, trying to understand what I did wrong in the RDL. Just to find out that the DataSource was returning more than one row per country, so the poor RS didn't know which row to map.

Execution order differs with rendering mode

Today our tester found a big saying "Incorrect numbering of the tables in the PDF export".
The issue is that we have a custom code function incrementing a number and than returning the resulting number. It starts from 0 and it'll return 1 first time it is called, 2 afterwards, 3 and so on. It works fine when my report renders in HTML, but not when it renders as PDF. The first table is numbered with 5 and the rest are numbered in order 1 to 4

The only difference between the first table and the rest is that the first table displays the table number in a row, while for the rest I had to add a text box above the table.

Apparently, the execution order of custom code is different when report is rendered in browser vs when it renders as PDF. I did a simple test by creating a test report, with just a matrix, a table and a text box and the textbox is indeed rendered first (it executes the custom code first). Only after, the tablixes are rendered

SSRS 2008 incorrect number of TablixCornerCell

I got a "nice" error today , while working on a report converted from SSRS 2005 to SSRS 2008.

Error 1 [rsWrongNumberOfTablixCornerCells] The tablix ‘matrix4’ has an incorrect number of TablixCornerCell. The number of TablixCornerCell within TablixCornerRow at index: 0 must equal the number of levels in the TablixRowHierarchy containing TablixHeaders.

Update , 2012-02-10: I fixed the problem by simply reading carefully the error message. All I did was adding an empty <TablixCornerCell></TablixCornerCell> into the <TablixCornerRow>