>Would it be possible to see your code? I have from 25 to 250 users on VFP applications I have created and we do not have these problems.

Yes, thanks for your help, I have a milion headaches every day from that behaviour.

the code are in methods of baseform class on wich are based all forms
the tables are optimistic table buffer

proc new - adds a new record to parent and child
< pre>
local ldatamaster,ldataslave,llink,lmasterlink

ldatamaster=thisform.datamaster
ldataslave=thisform.dataslave
llink=thisform.datalink
lmasterlink=thisform.datamaster+'.'+thisform.datalink

if dpageform::new()
if cursorgetprop('SourceType',ldataslave)=3
if this.autoitem
insert into (ldataslave) (&llink) values (&lmasterlink)
endif
thisform.refreshform()
else
=requery(ldataslave)
endif
endif
< /pre>

proc newgrid - adds a record to child
< pre>
local ldatamaster,ldataslave,llink,lmasterlink

ldatamaster=thisform.datamaster
ldataslave=thisform.dataslave
llink=thisform.datalink
lmasterlink=thisform.datamaster+'.'+thisform.datalink

sele (ldataslave)
delete for empty(&llink)
append blank
replace &llink with &lmasterlink
thisform.refreshform()
thisform.pageframe1.page1.gridslave.setfocus()
thisform.pageframe1.page1.gridslave.activatecell(thisform.pageframe1.page1.gridslave.activerow,1)
< /pre>

proc save - save all data
< pre>
local ldatamaster,ldataslave,llink,lmasterlink,lerror

ldatamaster=thisform.datamaster
ldataslave=thisform.dataslave
llink=thisform.datalink
lmasterlink=thisform.datamaster+'.'+thisform.datalink

thisform.activarecimp && sets a focus on first textbox
sele (ldatamaster)

if thisform.writebuffer()
begin transaction
lerror=(txnlevel()=0)
if !lerror
if getfldstate(-1)=replicate("1",fcount()+1)
=setfldstate(2,2)
endif
=reccount()
lerror=!tableupdate(.T.)
sele (ldatamaster)
FLUSH
if !lerror
select (ldataslave)
=reccount()
lerror=!tableupdate(.T.)
endif
if !lerror
end transaction
FLUSH
sele (ldatamaster)
GO (RECNO())
wait window nowait 'Informatii salvate!'
??chr(7)
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
< /pre>

=reccount(), flush was addeded in try to resolve the problem