[Tutor] TypeError: while constructing argument 4:

[Todd G. Gardner]

Hello all,

I need to ask for some of your expertise.  How to define the variable so
that I can pass it as an array of 16 bit integers?

...
ni = windll.nidaq32
buffer = c_int * 100
status = ni.DAQ_Op (deviceNumber, chan, gain, buffer, count, sampleRate)
>>>
Traceback (most recent call last):
  File "<string>", line 1, in ?
  File "C:\Documents and Settings\tnt\My Documents\pc\ctypes\DAQ_Op1.py",
line 21, in ?
    status = ni.DAQ_Op (deviceNumber, chan, gain, buffer, count, sampleRate)
TypeError: while constructing argument 4:
Don't know how to convert parameter 4
>>>

"""
BEGIN DEFINITION of the variable array {buffer}
buffer [i16] contains the acquired data

buffer is an integer array. buffer has a length equal to or greater than
count. When DAQ_Op returns with an error number equal to zero, buffer
contains the acquired data.

The buffer must be aligned on a 4-byte boundary. If the buffer is allocated
as an array of i32s, it must be typecast to an i16 pointer when passing its
address to DAQ_Op. If the buffer is allocated as a double-sized array of
i16s, the user must check that the buffer is aligned on a 4-byte boundary
before passing the buffer to DAQ_Op.
END DEFINITION of the variable array {buffer}
"""

Thank you SO much for any information,

Todd
--
P.S. Sorry if this is a repost.  I am not sure if this was posted before so
I am resending it.