Lockfile Problem??

[Del]

I have been getting the following error randomly on different files while running a process that pays multiple invoices from a single check.  Sometimes it happens on something as simple as looking up a free record from a transaction history file.  My question is, is the system telling me it has a problem with the lockfile for the reference file?  And does anyone know what the problem might be or why it might have such a problem?  I have never seen this error before.

*** A filePro Error Has Occurred ***
On File: \Loan_Master/filepro/lnmstr/lockfile
Input Processing 
Line Number: 282
lnm(99)=lnm(99)-40;lnm(114)=19;
screen ;goto recp
File not found

Del Neroni
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