Some times get error 1884 and sometimes no error but when try to find NRDOC previously saved I can't

Problem is when set order to NRDOC and do Seek 'VCX34356634' I get to record with NRDOC='02282/224' that meens the table index is wrong.
Should I put a FLUSH after tableupdate or anything else?

>Is the error you get error #1884 - Uniqueness of Index MyIndex is Violated? This is what it looks like from your description. If so, there is a problem with how you are generating unique values for your primary key field.
>
>>Hi all,
>>
>>In several applications wich are made based on same framework (clases build by myself) things are go wrong with indexes in saved records to tables one-to-many forms. If in application work one user everything is ok, but when working more users it's happening to save bad entryes in indexes (primary or candidate).
>>When this happens there are NO crushes, power failures, net failures or other things.
>>Supose we have 2 tables T1MASTER and T2CHILD with IDT as primary and link field and in T1MASTER candidate field NRDOC; when saving a new record there are possibilities to get T2CHILD recs saved, in T1MASTER get error NRDOC index violated; when open T1MASTER and activate index NRDOC and search for record just entered the pointer take me to a record with other NRDOC
>>
>>The save procedure in clases are like this:

>>local ldatamaster,ldataslave,llink,lmasterlink,lerror
>>
>>ldatamaster=thisform.datamaster
>>ldataslave=thisform.dataslave
>>llink=thisform.datalink
>>lmasterlink=thisform.datamaster+'.'+thisform.datalink
>>
>>thisform.activarecimp
>>sele (ldatamaster)
>>
>>if thisform.writebuffer()
>>	begin transaction
>>	lerror=(txnlevel()=0)
>>	if !lerror
>>		if getfldstate(-1)=replicate("1",fcount()+1)
>>			=setfldstate(2,2)
>>		endif
>>		lerror=!tableupdate()
>>		if !lerror
>>			select (ldataslave)
>>			lerror=!tableupdate(.t.)
>>		endif
>>		if !lerror
>>			end transaction
>>		else
>>			thisform.lockscreen=.t.
>>			rollback
>>			thisform.refreshform()
>>			thisform.lockscreen=.f.
>>			=aerror(laerror)
>>			thisform.error(laerror[1],laerror[2],0)
>>		endif
>>	endif
>>endif
>>
>>sele (ldatamaster)
>>thisform.refreshform()
>>return !lerror