I also get the same error message on my Funai DVD Recorder with Video Cassette recorder. Like you I have spent a lot of moneey on several different brands of the dicc recommended in the Funai Owner's Manual and also got an Av diagnostics lens cleaner too and all the time keep getting the following message »»»» Cannot record using this disc :Error Message E4-54037380.. it is driving me nuts --would apprecaite any help you might be able to give me. Dermot

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