Hello!! At the bottom of this post is my tester for a Matrix Batch File. Problem? It keeps saying 'ECHO is off.' Don't know how to fix it. need your help. Please have a look, and suggest a resolution. @echo off cls color 0A :mtrxst2 @echo off set /a mAsp=%random%%%6+1 if '%mAsp%'=='1' goto mtrxmA1 if not '%mAsp%'=='1' goto mtrxmA2 :mtrxmA1 set /a mA=%random%%%9+0 goto mtrxmA3 :mtrxmA2 set mA= :mtrxmA3 @echo off set /a mBsp=%random%%%6+1 if '%mBsp%'=='1' goto mtrxmB1 if not '%mBsp%'=='1' goto mtrxmB2 :mtrxmB1 set /a mB=%random%%%9+0 goto mtrxmB3 :mtrxmB2 set mB= :mtrxmB3 @echo off set /a mCsp=%random%%%6+1 if '%mCsp%'=='1' goto mtrxmC1 if not '%mCsp%'=='1' goto mtrxmC2 :mtrxmC1 set /a mC=%random%%%9+0 goto mtrxmC3 :mtrxmC2 set mC= :mtrxmC3 @echo off set /a mDsp=%random%%%6+1 if '%mDsp%'=='1' goto mtrxmD1 if not '%mDsp%'=='1' goto mtrxmD2 :mtrxmD1 set /a mD=%random%%%9+0 goto mtrxmD3 :mtrxmD2 set mD= :mtrxmD3 echo %mA% %mB% %mC% %mD% @echo off goto mtrxst2

It's because you've got this line: echo %mA% %mB% %mC% %mD% and all the variables translate to an empty string, because none of them have been set. In that case, the command is actually just this: echo which means "tell me whether echo is on or off." You can look through your code and work out the probability that any of these variables will have been set - it's like throwing a dice each time you are about to set a variable and only setting it if you throw a certain number.

I'am a Chinese,I'm not good at English... '====================================== Because all %m?sp% is empty string, A B C D all jump to :mtrxm?2 very likely in near value series Fix it code is so easy,just put a drop after "echo" ,like this: '================================== echo. %mA% %mB% %mC% %mD% '================================== this drop can hide 'echo is off' to reveal

and,your example have too much unnecessary code,you can truncate like this: '================================ @echo off&color 0A&setlocal enabledelayedexpansion :mtrxst2 set /a q+=1 set /a ALLsp%q%=!random!%%6+1 if !ALLsp%q%!==1 ( set /a "m%q%"=!random!%%9+0 ) else ( set m%q%= ) if %q%==4 ( set /a q=0 & echo. %m1% %m2% %m3% %m4%) goto :mtrxst2 '================================ after amend,total code can lss than anyone str setting part in original code, just have 4 line of nucleus