OSError: [WinError 193] %1 is not a valid Win32 application about pylink

[saeugetier]

Solution would be that on 64bit windows systems not JLinkARM.dll should be used. Please use JLink_x64.dll

The code could look something like that:
`WINDOWS32_JLINK_SDK_NAME = 'JLinkARM'
WINDOWS64_JLINK_SDK_NAME = 'JLink_x64'

if platform.architecture()[0]=='32bit':
        WINDOWS_JLINK_SDK_NAME = WINDOWS32_JLINK_SDK_NAME
elif platform.architecture()[0]=='64bit':
     WINDOWS_JLINK_SDK_NAME = WINDOWS64_JLINK_SDK_NAME`

[rils]

I understood the problem. My PC is running on 64bit Win7 OS. SO I selected 64bit python version 3.6. But the JlinkARM.Dll is for 32bit. So python could not load it. I uninstalled python and installed 32bit version. Now Everything works good.! Thanks.

[zamora18]

@saeugetier what I did was alter the file in pylink/library.py and changed line 87 to:

WINDOWS_JLINK_SDK_NAME = 'JLink_x64'

As of now it is working fine, and it eliminated the OSError: [WinError 193] %1 is not a valid Win32 application error, but I want to know if this is acceptable? I don't want it to cause problems later on.

[hkpeprah]

Ah, interesting. This was an oversight on our part. If you want to submit a patch for this, that would be great!

[saeugetier]

@zamora18 yes, you can do this. But then the code will only run on a 64bit system.

[zamora18]

I think @saeugetier's addition to select between 32-bit and 64-bit systems would be a good solution.

I am not sure if this error is related to my change, but I get this output:

No handlers could be found for logger "pylink.jlink"
Traceback (most recent call last):
  File "C:/Users/zamora/PycharmProjects/jflash/my_flash_test.py", line 20, in <module>
    jlink.connect("STM32F446RE", verbose=True)
  File "C:\Users\zamora\PycharmProjects\jflash\pylink\jlink.py", line 141, in wrapper
    return func(self, *args, **kwargs)
  File "C:\Users\zamora\PycharmProjects\jflash\pylink\jlink.py", line 912, in connect
    raise errors.JLinkException(result)
pylink.errors.JLinkException: Unspecified error.

I have been trying to trace the error, because Unspecified error is not very clear.
The last portion of the error occurs after this call in jlink.py:

result = self._dll.JLINKARM_Connect()
        if result < 0:
            raise errors.JLinkException(result)

I can't tell if it is actually looking for JLINKARM still since I changed to JLINK_x64? Could you help me with this? Thank you.

[hkpeprah]

There's some documentation here around this error: http://pylink.readthedocs.io/en/latest/troubleshooting.html

It's a generic catch-all.

[zamora18]

Thank you, I looked over those errors, and in my case I am attempting to connect to the target when it fails. I believe I may be "trying to connect to the target over JTAG when it only supports SWD".

However, in the documentation, it states that I need to be connected to the target before I can call swo_start(). I double-checked the other possible diagnoses for my error and it does not seem to be any of them.
It has been difficult to diagnose because I have used the J-Link JFlash software and it connects & programs just fine (see image). One more detail to note, is that I have gotten my python script to work, but it is very seldom and sporadic. What I usually try to do is use the J-Flash utility and erase the chip multiple times, and power cycle the device over and over.

I really appreciate any help.

[hkpeprah]

swo_start is for using Serial-Wire Output (SWO), you don't want to use it here (unless you want to do SWO stuff as well). You want to connect over SWD:

jlink = pylink.JLink()
jlink.open()
jlink.set_tif(JLinkInterfaces.SWD)
jlink.connect('STM32F446RE')

You can then call swo_start() to use SWO.

[zamora18]

Using jlink.set_tif(pylink.JLinkInterfaces.SWD) worked!

Thank you for your help!

[zamora18]

I am setting up a new machine and am still getting this same error on 64-bit.

[zamora18]

@hkpeprah This PR does fix my issue and I no longer get the OSError: [WinError 193] %1 is not a valid Win32 application error message.

[TiagoSousa26]

I am still getting this error. It seems to not be fixed :(

File "", line 1, in

File "c:\users\yv999fy\onedrive - ey\documents\aflac_wwhq\model results\output_total\Compare.py", line 370, in compare_care

import xlwings as xw

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\xlwings_init_.py", line 9, in

from . import _xlwindows as xlplatform

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\xlwings_xlwindows.py", line 25, in

from comtypes import IUnknown

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\comtypes_init_.py", line 1176, in

class IPersist(IUnknown):

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\comtypes_init_.py", line 1181, in IPersist

( ['out'], POINTER(GUID), 'pClassID' )),

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\comtypes_init_.py", line 1099, in COMMETHOD

from comtypes.automation import VARIANT

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\comtypes\automation.py", line 12, in

from comtypes import npsupport

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\comtypes\npsupport.py", line 5, in

import numpy

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\numpy_init_.py", line 140, in

from . import _distributor_init

File "C:\Users\YV999FY\AppData\Roaming\Python\Python37\site-packages\numpy_distributor_init.py", line 26, in

WinDLL(os.path.abspath(filename))

File "C:\Users\YV999FY\Anaconda3\lib\ctypes_init_.py", line 364, in init

self._handle = _dlopen(self._name, mode)

OSError: [WinError 193] %1 is not a valid Win32 application

Can someone help with this??

[hkpeprah]

Can someone help with this??

@jjaredrides I would open a new issue for different/new questions. That being said, the issue is likely that you're using a 32-bit Python, but 64-bit application. I would ensure you're using the 64-bit Python.