When Things Go Wrong

When there is in trouble, try to solve it by these ways.

As running pyarmor:

  • Check the console output, is there any wrong path, or any odd information

  • Run pyarmor with debug option -d to get more information. For example:

    pyarmor -d obfuscate --recurisve foo.py

As running the obfuscated scripts:

  • Turn on Python debug option by -d to print more information. For example:

    python -d obf_foo.py
  • After debug option is on, there will be a log file pytransform.log generated in the current path. Check its content to find where the problem is.

Segment fault

In the following cases, obfuscated scripts will crash

  • Running obfuscated script by the debug version Python
  • Obfuscating scripts by Python 2.6 but running the obfuscated scripts by Python 2.7

After PyArmor 5.5.0, some machines may be crashed because of advanced mode. A quick workaround is to disable advanced mode by editing the file pytransform.py which locates in the installed path of pyarmor , in the function _load_library, uncomment about line 202. The final code looks like this:

# Disable advanced mode if required
m.set_option(5, c_char_p(1))

Could not find _pytransform

Generally, the dynamic library _pytransform is in the Runtime Package, before v5.7.0, it’s in the same path of obfuscated scripts. It may be:

  • _pytransform.so in Linux
  • _pytransform.dll in Windows
  • _pytransform.dylib in MacOS

First check whether the file exists. If it exists:

  • Check the permissions of dynamic library

    If there is no execute permissions in Windows, it will complain: [Error 5] Access is denied

  • Check whether ctypes could load _pytransform:

    from pytransform import _load_library
    m = _load_library(path='/path/to/dist')
  • Try to set the runtime path in the Bootstrap Code of entry script:

    from pytransform import pyarmor_runtime

Still doesn’t work, report an issue

The license.lic generated doesn’t work

The key is that the capsule used to obfuscate scripts must be same as the capsule used to generate licenses.

The Global Capsule will be changed if the trial license file of PyArmor is replaced with normal one, or it’s deleted occasionally (which will be generated implicitly as running command pyarmor obfuscate next time).

In any cases, generating new license file with the different capsule will not work for the obfuscated scripts before. If the old capsule is gone, one solution is to obfuscate these scripts by the new capsule again.

NameError: name ‘__pyarmor__’ is not defined

No Bootstrap Code are executed before importing obfuscated scripts.

When creating new process by Popen or Process in mod subprocess or multiprocessing, to be sure that Bootstrap Code will be called before importing any obfuscated code in sub-process. Otherwise it will raise this exception.

Marshal loads failed when running xxx.py

  1. Check whether the version of Python to run obfuscated scripts is same as the version of Python to obfuscate script
  2. Run obfuscated script by python -d to show more error message.
  3. Be sure the capsule used to generated the license file is same as the capsule used to obfuscate the scripts. The filename of the capsule will be shown in the console when the command is running.

_pytransform can not be loaded twice

When the function pyarmor_runtime is called twice, it will complaint _pytransform can not be loaded twice

For example, if an obfuscated module includes the following lines:

from pytransform import pyarmor_runtime

When importing this module from entry script, it will report this error. The first 2 lines should be in the entry script only, not in the other module.

This limitation is introduced from v5.1, to disable this check, just edit pytransform.py and comment these lines in function pyarmor_runtime:

if _pytransform is not None:
    raise PytransformError('_pytransform can not be loaded twice')


This limitation has been removed from v5.3.5.

Check restrict mode failed

Use obfuscated scripts in wrong way, by default all the obfuscated scripts can’t be changed any more.

Besides packing the obfuscated scripts will report this error either. Do not pack the obfuscated scripts, but pack the plain scripts directly.

For more information, refer to Restrict Mode

Protection Fault: unexpected xxx

Use obfuscated scripts in wrong way, by default, all the runtime files can’t be changed any more. Do not touch the following files

  • pytransform.py
  • _pytransform.so/.dll/.dylib

For more information, refer to Special Handling of Entry Script

Warning: code object xxxx isn’t wrapped

It means this function isn’t been obfuscated, because it includes some special instructions.

For example, there is 2-bytes instruction JMP 255, after the code object is obfuscated, the operand is increased to 267, and the instructions will be changed to:

JMP 11

In this case, it’s complex to obfuscate the code object with wrap mode. So the code object is left as it’s, but all the other code objects still are obfuscated.

In later version, it will be obfuscated with non wrap mode.

In current version add some unused code in this function so that the operand isn’t the critical value may avoid this warning.


This has been fixed in v5.5.0.

Error: Try to run unauthorized function

If there is any file license.lic or pytransform.key in the current path, pyarmor maybe reports this error. One solution is to remove all of that files, the other solution to upgrade PyArmor to v5.4.5 later.

Run obfuscated scripts reports: Invalid input packet

If the scripts are obfuscated in different platform, check the notes in Distributing Obfuscated Scripts To Other Platform

Before v5.7.0, check if there is any of license.lic or pytransform.key in the current path. Make sure they’re generated for the obfuscated scripts. If not, rename them or move them to other path.

Because the obfuscated scripts will first search the current path, then search the path of runtime module pytransform.py to find the file license.lic and pytransform.key. If they’re not generated for the obfuscated script, this error will be reported.

‘XXX’ codec can’t decode byte 0xXX

Add the exact source encode at the begin of the script. For example:

# -*- coding: utf-8 -*-

Refer to https://docs.python.org/2.7/tutorial/interpreter.html#source-code-encoding

/lib64/libc.so.6: version ‘GLIBC_2.14’ not found

In some machines there is no GLIBC_2.14, it will raise this exception.

One solution is patching _pytransform.so by the following way.

First check version information:

readelf -V /path/to/_pytransform.so

Version needs section '.gnu.version_r' contains 2 entries:
 Addr: 0x00000000000056e8  Offset: 0x0056e8  Link: 4 (.dynstr)
  000000: Version: 1  File: libdl.so.2  Cnt: 1
  0x0010:   Name: GLIBC_2.2.5  Flags: none  Version: 7
  0x0020: Version: 1  File: libc.so.6  Cnt: 6
  0x0030:   Name: GLIBC_2.7  Flags: none  Version: 8
  0x0040:   Name: GLIBC_2.14  Flags: none Version: 6
  0x0050:   Name: GLIBC_2.4  Flags: none  Version: 5
  0x0060:   Name: GLIBC_2.3.4  Flags: none  Version: 4
  0x0070:   Name: GLIBC_2.2.5  Flags: none  Version: 3
  0x0080:   Name: GLIBC_2.3  Flags: none  Version: 2

Then replace the entry of GLIBC_2.14 with GLIBC_2.2.5:

  • Copy 4 bytes at 0x56e8+0x10=0x56f8 to 0x56e8+0x40=0x5728
  • Copy 4 bytes at 0x56e8+0x18=0x5700 to 0x56e8+0x48=0x5730

Here are sample commands:

xxd -s 0x56f8 -l 4 _pytransform.so | sed "s/56f8/5728/" | xxd -r - _pytransform.so
xxd -s 0x5700 -l 4 _pytransform.so | sed "s/5700/5730/" | xxd -r - _pytransform.so

Purchased pyarmor is not private

Even obfuscated with purchased version, license from trial version works:

  • Make sure command pyarmor register shows correct registration information
  • Make sure Global Capsule file ~/.pyarmor_capsule.zip is same as the one in the keyfile pyarmor-regfile-1.zip
  • Try to reboot system.

No module name pytransform

If report this error as running command pyarmor pack:

  • Make sure the script specified in the command line is not obfuscated

  • Run pack with extra option --clean to remove cached myscript.spec:

    pyarmor pack --clean foo.py

ERROR: Unsupport platform linux.xxx

In some machines pyarmor could not recognize the platform and raise error. If there is available dynamic library in the table Table-2. The Others Prebuilt Libraries For PyArmor. Just download it and save it in the path ~/.pyarmor/platforms/SYSTEM/ARCH, this command pyarmor -d download will also display this path at the beginning.

If there is no any available one, contact jondy.zhao@gmail.com if you’d like to run pyarmor in this platform.