8051..running the program..error | Microcontroller › 8051 › 8051..running the program..error This topic has 0 replies, 1 voice, and was last updated 11 years, 5 months ago by asd. Viewing 1 post (of 1 total) Author Posts April 21, 2013 at 8:09 am #2284 asdParticipant error 56 is coming whenever i am using keil uvision3…what to do? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In