network problems

[dinakar]

we have a network with 70 computers of win 98 2000 and xp . we are having novell netware 5.1 server . i am facing some critical problem . i.e some times my files on netware server will not save after my work it will says that there is a sharing violation . the source may be in use ....
why this is happening ??
thanks in advance

[classicsoftware]

What is the application in question?