PCAN Basic Example error

[suresheps]

Hi, I Am trying to use PCAN Basic library. So stared with "PCANBasicExample.pyw" but i am getting below error

Code: Select all

    objPCAN = PCANBasic()
  File "C:\Users\Downloads\pcan-basic\PCAN-Basic API\Samples\Python\PCANBasic.py", line 348, in __init__
    self.__m_dllBasic = windll.LoadLibrary("PCANBasic")
  File "C:\Python27\lib\ctypes\__init__.py", line 444, in LoadLibrary
    return self._dlltype(name)
  File "C:\Python27\lib\ctypes\__init__.py", line 366, in __init__
    self._handle = _dlopen(self._name, mode)
WindowsError: [Error 126] The specified module could not be found

somehow script is not recognizing the DLL, please help

[K.Wagner]

Hello,

please check that:

1. you have installed PCAN-Basic with our PEAK-Drivers setup, or that you have copied the PCANBasic.dll to the same folder in where your python file is located.
2. the platform of your python compiler and the used dll are the same, i.e. both 32-bit or both 64-bit. By python you see this in the header of the python console, at start. For PCAN-Basic you can see this in the file properties: richt-mouse click on the file, select "Properties" and go to the tab "Details". The description text shows the platform for which the dll was compiled.

[efariv]

I'm encountering the same issue even after verifying the two things you've noted above. However, I'm seeing the following different error message:

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Traceback (most recent call last):
  File ".\readPCAN2.py", line 3, in <module>
    from PCANBasic import *
  File "C:\SW_WIP\PCAN\scripts\PCANBasic.py", line 22, in <module>
    from ctypes import *
  File "C:\Python27\lib\ctypes\__init__.py", line 7, in <module>
    from _ctypes import Union, Structure, Array
ImportError: DLL load failed: %1 is not a valid Win32 application.

This is using the latest PCAN-Basic API downloaded from the website.

[K.Wagner]

Hello,

please check again. The error message is clearly saying that "ImportError: DLL load failed: %1 is not a valid Win32 application". This is due to a mix-up of the libraries (Win32 vs. x64), i.e. you are using a 32-bit python interpreter, but a x64 PCANBasic.dll

If you have manually copied the PCANBasic.dll to your project folder, then check that it is the Win32 version of it. Just right-click with the mouse on the PCANBasic.dll file and check the description of it in the tab "Details".