Are you putting the radio in to clone mode before you try uploading to the radio?<br><br>On Saturday, August 6, 2016, R Datus via chirp_users &lt;<a href="mailto:chirp_users@intrepid.danplanet.com">chirp_users@intrepid.danplanet.com</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div>Yaesu FT-8900 will download to CHIRP, but will not upload.  I get &quot;an error has occurred radio did not ack block at (various numbers, e.g., 520, 584, 9854)&quot;</div><div><br></div><div>Please help me find a solution to using Chirp to program the FT-8900 that my wife worked extra hours to give me for HER birthday.  HRO wants another $40 for programming software.</div><div><br></div><div>Please help.  </div><div><br></div><div>KD0RLZ@ <a href="http://yahoo.com" target="_blank">yahoo.com</a></div></div></div></blockquote>