Unable to change the length of field in idoc segment

Dear all,
My requirement is to change the length of a field(Z field) in a segment (Z Segment). I tried the following but in vain
1)Tried to Cancel the release and then change the length of the domain. Unfortunately it is givin an error saying "Error while resetting release of segment ZC9DEMARA01".
I also tried cancelling hte release of extension and then cancelled the release of segment
2) Created a new version, but in new version the earlier fields are diabled. So I am unable to edit.
I have gone through some of the links available in SDN but I could not solve as I am unable to cancel the release in the first step.
[Idoc segment field length changes]
Could you please help me.
Thanks in advance!
regards,
Aravind

Hello Aravind,
I Have created one Segment type with some fields, changed the field length also its working.
just try to cancel the release and change the length of the filed and do it set release again.
Try it .
Thanks,
santhosh

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