I have a VFP 6 applications that 5-20 users use to post up to 1500 transactions per week. About 1 / 5000 of these transactions fail with an 1105 error message (error writing to disk). The error is occuring on the END TRANSACTION. When this error occurs several tables included in the transaction are corrupted. Is it possible that this is being caused by the PC or network caching writes. How do I check / disable caching in NT? What else could cause this?