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Cant read RTU data #59

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Connecting to an RTU serial client
2. Try to read from a holding register

I keep getting a recurring issue where python yells at me with the following: 

"Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "build/bdist.cygwin-1.7.11-i686/egg/pymodbus/client/common.py", line 109, in read_holding_registers
  File "build/bdist.cygwin-1.7.11-i686/egg/pymodbus/client/sync.py", line 131, in execute
  File "build/bdist.cygwin-1.7.11-i686/egg/pymodbus/client/sync.py", line 51, in execute
  File "build/bdist.cygwin-1.7.11-i686/egg/pymodbus/transaction.py", line 406, in processIncomingPacket
  File "build/bdist.cygwin-1.7.11-i686/egg/pymodbus/transaction.py", line 310, in checkFrame
  File "build/bdist.cygwin-1.7.11-i686/egg/pymodbus/transaction.py", line 352, in populateHeader
AttributeError: 'NoneType' object has no attribute 'calculateRtuFrameSize'
"

Original issue reported on code.google.com by TextTedX...@gmail.com on 26 Mar 2012 at 8:48

GoogleCodeExporter commented 9 years ago 
This should be fixed in the current version (in the git repository on github).  
There was an error with exception responses not being properly sent down the 
chain (with None's instead).  Let me know if the problem still persists.

Original comment by Bashw...@gmail.com on 6 Jun 2012 at 6:37

GoogleCodeExporter commented 9 years ago

Original comment by Bashw...@gmail.com on 8 Jun 2012 at 1:53