Now I know what's happening.

According to the Ketron SD40 Table pdf file, your SysX is for the Audya series, and yet works on the SD40, too. I was working with the SysX messages for the MS, X, and SD series as in the manual, and none of it worked. AJ emailed me F0 26 7C 67 7F F7 00. It didn't work.I found out that a 00 message after the F7 message will just lead to an invalid SysEx message. I also found out that the SysX under the heading of Foot switch MIDIJPRO works on the SD40. Phew, Ketron sure knows how to throw customers a curve ball.

Thank you, Curt, for the correct information. BTW, in the video you mention various banks for calling up factory and user styles. I could not find a single reference in the manual, do you have a chart for the banks and program numbers for the styles?

Thank you again,
Chris
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"You Shall Know the Truth, and the Truth will set you free." John 8:32