Hi all, 
 
I am trying to take a checkpoint after simulating some number of cycles. 
 
I tried implementing that functionality by calling "create_checkpoint" in 
ptl-qemu.cpp (/ptlsim/sim) from ptlsim.cpp (/ptlsim/sim). 
 
It seemed to make an intended checkpoint; however, it cannot continue 
simulation because it fails at "assert(physreg->data);" line in ooo-pipe.cpp 
(/ptlsim/core/ooo-core) after few hundreds of instructions.
 
It would be really helpful if anyone has an idea about why this is happening.
 
Thank you
 
-Tae Jun Ham
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