Use MCI to do a small program, music playback on the production of computer test, installation to another computer, in some MP3 (not all) of the file open, namely implement
McISendString (' open '+ name + ", "alias MyPlay'," ", 0, 0)
, there will be a 277 error,
Production environment is a 64 - bit Win10 + VFP9.0 SP2, using the environment in the process is a 64 - bit Windows 7, at first thought it was the cause of the system, the application of computer to 64 Win10 fault is still ruled out the cause of the system,
After the search on the net, only to find huaiwen_zhang teacher's article, https://blog.csdn.net/wymon_zhang/article/details/38843373, was it a matter of MP3, then try turns into all the faulty MP3 WMA format, problem solved!

This problem is only a temporary solution, ultimately didn't solve the problem of 277 because
(1) the user again after it is not always possible to convert the format of the music playback, oneself also don't feel convenient,
(2) not all cannot play MP3, but some can not,
(3) the most important thing is: use the program on a computer can't play MP3, computer in the production program can be broadcast,

For this problem confused for several days, please everybody to help, in this thank you!