It might help to write the records you need to separate tables of the same structure as the production targets, then do the synchronizations immediately after disconnecting. Thus if your send dies before completion, you haven't touched your production tables. If you have those records in a separate DBF, you can test for corruption of the DBF file by indexing on a character field, then GO TOP and test the ASCII value of the first byte - if it's less than 32 (space), you probably have physical corruption. Then GO BOTTOM and do the same thing. Greater than 127 is probably corrupted (since you're in the USA). If you're getting "index does not match table", you stand a much better chance of success doing the download as a separate act and merging the data once it's safely on your LAN.