[Problem]IAR C for AVR

iar error[e16]

While making a program for ATtiny13 in IAR EWB 4.20A for AVR, I always get this msg out. What am I going to do ????? see below, help, thanks!!

Rebuilding configuration: BL - Release

0 file(s) deleted.
main.c
Linking
Error[e16]: Segment RSTACK (size: 0x20 align: 0) is too long for segment definition. At least 0x5 more bytes needed. The problem occurred while
processing the segment placement command "-Z(DATA)RSTACK+_..X_RSTACK_SIZE=_..X_RSTACK_BASE-_..X_RSTACK_END", where at the
moment of placement the available memory ranges were "DATA:85-9f"
Reserved ranges relevant to this placement:
DATA:60-64 TINY_Z
DATA:65-84 CSTACK
DATA:85-9f RSTACK

Total number of errors: 1
Total number of warnings: 0

iar rstack cstack

I don't have the AVR compiler in front of me but from the error message I would say you need to expand RSTACK. change it from 9F A9 and you should be ok.

avr check rstack

This is a typical configuration trouble. Check in project options and set correcty the parameters like cpu, memory model, etc.

Gorkin.

iar cstack rstack heap

If possible decrease Heap and CSTACK sizes and add it to RSTACK.