Sometimes, i still cannot guess when it happens, i get the error 111 :
"Cannot update the cursor LOG, since it is read-only." for the file LOG, I used the routine Serghey suggested me to retrieve who and how use files and as result, for that file I got this report :

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File name: E:\pontinia\dati\Log.dbf
Locks: 0
User:FELICE
Permissions: - Read - Write - ChangeAttributes
ID for NetFileGetInfo() : 726884
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File name: E:\pontinia\dati\Log.CDX
Locks: 0
User:FELICE
Permissions: - Read
ID for NetFileGetInfo() : 726886
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The routine which causes the error is always the same and I cannot realize why this error occurs. The procedure which causes the errors is related to a timer event and is launch every 30 seconds, the error occurs once a day maybe twice...
Any ideas ?
Alessio