Hello , i have a code that gives me:


1) What these mean?Some wrong with the code ?

Then , i added driver.Context.synchronize() after the kernel and the program
run fine!

But, after many runs ,i tried to run it today and it gives me:



Yesterday was running ,today not!

2)The Context.synchronize() has any impact on the code?When we should use
it?And when a program runs with this add and not without it,what does it
mean?

Thank you!



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