No source available for "[PC = 0x0000030C]()

I am using Eclipse with (IAR C/C++ Compiler for ARM, IAR Assembler and IAR linker), on Controller "EFM32GG" and I debug my chip using the JTAG through "EFM32 Development Kit".

The problem is that sometimes i got that error when i want to debug my code. the cases that this error appears:

1- start the debug and run it until a break point (F8), if I debug the code step by step(F6, F5) it don't appear.

2- The code size is big it comes very frequently (if i removed the Logging or decreased it to be only error log to appear, it don't appear)

I have read the two topices before

1- Eclipse error: No source available for "" I have tried this solution but did't work by me.

2-"No source available for main()" error when debugging simple C++ in Eclipse with gdb
most of the people speaks about adding some flags to the GCC compiler, but I am using IAR compiler and only these flags i have
"${COMMAND} ${INPUTS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${FLAGS}"

as well i have no such big Experience in command line debugging

any help is very welcome, or even where can i try and Search for Solution.

problem area disassembly enter image description herecompiler