![Overlay other graphs on a bar chart with PROC SGPLOT](https://blogs.sas.com/content/iml/files/2021/04/Hbarbasic2-640x336.png)
It can be frustrating to receive an error message from statistical software. In the early days of the SAS statistical graphics (SG) procedures, an error message that I dreaded was ERROR: Attempting to overlay incompatible plot or chart types. This error message appears when you attempt to use PROC SGPLOT