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  1. Delphi 11.1 Datasnap Having trouble writing a blob field from a client app to the database on server. Client uses SQLite database and main database on server is Firebird. Client app uses TMSFNCSignature Capture component to write the signature to the SQLite database blob field like this and the image is actually saved to the blob field: procedure TMainForm.Save_Signature; var ms : tMemoryStream; begin ms := TMemoryStream.Create; EMUSig.SaveToImageStream(ms); Open_InvSigQry(MarafillerDM.FDQuerySchedSALEDATE.Value, MarafillerDM.FDQuerySchedMACHID.Value); MarafillerDM.InvSigQry.Insert; MarafillerDM.InvSigQrySALEDATE.Value := MarafillerDM.FDQuerySchedSALEDATE.Value; MarafillerDM.InvSigQryMACHID.Value := MarafillerDM.FDQuerySchedMACHID.Value; MarafillerDM.InvSigQrySIGNATURE.LoadFromStream(ms); MarafillerDM.InvSigQry.Post; MarafillerDM.InvSigQry.Close; end; Using SQLite DBBrowser I can confirm that the image is written to the database (.png image). My problem is writing that image to a blob field on the server database (using datasnap for the connection). The table I am writing to on the server has several fields including 1 blob field defined as - 'CUSTSIGNATURE BLOB SUB_TYPE 0 SEGMENT SIZE 80' in the Firebird database. I use the following code to write to the database. The EMUInvQry gathers the necessary data to transfer from a couple of tables: procedure TMainForm.Transfer_EMUInvoice; var ms : tStream; begin MarafillerDM.EMUInvClient.Insert; MarafillerDM.EMUInvClientINVNUM.AsString := MarafillerDM.EMUInvQryDOCKET.AsString; MarafillerDM.EMUInvClientINVDATE.Value := ModifiedJulianDateToDateTime(MarafillerDM.EMUInvQrySALEDATE.Value); MarafillerDM.EMUInvClientMACHID.Value := MarafillerDM.EMUInvQryMACHID.Value; MarafillerDM.EMUInvClientTOTPKTS.Value := MarafillerDM.EMUInvQryPKTSALES.Value; MarafillerDM.EMUInvClientTOTVALUE.Value := MarafillerDM.EMUInvQryMACHVALUE.Value; MarafillerDM.EMUInvClientSITECODE.Value := MarafillerDM.EMUInvQrySITECODE.Value; MarafillerDM.EMUInvClientTOTRETPKTS.Value := MarafillerDM.EMUInvQryRETURN_PKTS.Value; MarafillerDM.EMUInvClientTOTRETVALUE.Value := MarafillerDM.EMUInvQryRETURN_VALUE.Value; MarafillerDM.EMUInvClientADJTOTPKTS.Value := MarafillerDM.EMUInvQryADJ_PKTS.Value; MarafillerDM.EMUInvClientADJTOTVALUE.Value := MarafillerDM.EMUInvQryADJ_VALUE.Value; if (MarafillerDM.EMUInvQryPAYEMUCOMM.AsString = 'F') then MarafillerDM.EMUInvClientCOMMISSION.Value := MarafillerDM.EMUInvQryCOMMISSION.Value; MarafillerDM.EMUInvClientBALANCEDUE.Value := MarafillerDM.EMUInvQryBAL_DUE.Value; MarafillerDM.EMUInvClientFILLER.AsString := sFillerName; ms := TStream.Create; MarafillerDM.EMUInvQrySIGNATURE.SaveToStream(ms); try if Assigned(ms) then MarafillerDM.EMUInvClientCUSTSIGNATURE.LoadFromStream(ms); finally ms.Free; end; MarafillerDM.EMUInvClient.Post; end; When I check the Firebird database, all fields are transferred except the blob field which is set to null. Can someone please advise me how to correctly transfer the blob field data. Have googled and tried a few different approaches but nothing works for me. Obviously missing something but can't see the forest for the trees. Any help would be appreciated. Bill Zwirs