Error: Unresolved inclusion: "altera_avalon_uart_regs.h" in Eclipse® project

Description

Due to issues in eclipse® compiler, it is not able to update the indexer. While including "altera_avalon_uart_regs.h". in a C or Cpp project, the compiler shows the following error message: 

Multiple markers at this line

- Unresolved inclusion: "altera_avalon_uart_regs.h" 

- fatal error: altera_avalon_uart_regs.h: No such file or directory

Resolution

To overcome this issue, you need to refresh the indexer by following the steps below:

1- Right click the application folder

2- Go to Index

3- Select Rebuild

4- If step 3 couldn’t help, select freshen All file