number sequence issue

Hi all,

I have numbers sequence named abc_20 with the range  

(smallest 1 highest 99999 next number 100000)

number it's showing number sequence exceeds.

we have tried to increase number sequence its format mismatched  but it's not showing next 11 character

after that we checked inventjournal edt string length is 10 then we change jounelid 15 but display length 10. so it's showing the 10 character only

can we do this process or not its some other process..