I am using SB 2019.5

When I try to build a project, I get the following fatal error message...

Fatal Compiler Error: GEN1092: Setup icon file too large: D:\bible\installer\icons\Install.ico

The install.ico file size is 356Kb.

Can you identify why 356Kb is "too large" to use? It is a valid .ico file.

I would attached the .ico file here, but your forum software doesn't permit .ico attachments.