So here I was, conducting a training for a customer, and I was showing the Excel Services features. I started creating an Excel sheet with dummy data, I created a chart from it and published it on SharePoint.
All goes well but when I opened the sheet from the document library, the Excel Services tried to render the graph in the web but than it failed saying that the Excel Calculation Services failed to show the chart. I was surprised a little bit, there is nothing fancy or complex in the graph, so why didn't it show?
After some thinking, I noticed that the color quality in my virtual machine dropped to 8 bit when I connected my machine to the projector. I disconnected it, modified the color quality to 24 bit and tried again: it worked ![]()
It seems that the Excel Calculation Services depends on the color quality on the server even though the graph was shown successfully in Excel client!!!