According to our programmer, we know the cause of the error, but unfortunately the reason lies outside our application. Error 1450 is a well-known issue for network database applications and has no direct solution. For more information about the error and for a list of possible solutions, see the links below.
https://support.microsoft.com/en-us/help/2002606/os-errors-1450-and-665-are-reported-for-database-data-files
https://support.microsoft.com/en-us/help/304101/backup-program-is-unsuccessful-when-you-back-up-a-large-system-volume
Please pass this information for the technical support team to help the user to resolve the issue.