Issue2607

I'm not totally sure I understand the cause but this user observes a problem launching, incidental to his original issue:
https://github.com/jythontools/jython/issues/78#issuecomment-309975998

I think this is related to Windows' attempt to ensure the latest version of any given DLL is in use. A search suggests it has come up in other contexts and is solvable using options on PyInstaller.

I get the same issue when attempting to use 2.7.1. 2.7.1b3 appears to work OK.

I suppose I could provide some actual detail, sorry for the double post. 

To be more specific, I get this issue when installing 2.7.1 from Maven:

 <execution>
                            <id>run-jython-installer</id>
                            <phase>package</phase>
                            <goals>
                                <goal>
                                    exec
                                </goal>
                            </goals>
                            <configuration>
                                <executable>java</executable>
                                <arguments>
                                    <argument>-classpath</argument>
                                    <classpath/>

                                    <argument>org.python.util.install.Installation</argument>

                                    <argument>--silent</argument>

                                    <argument>--directory</argument>
                                    <argument>src/test/resources/jython</argument>

                                        <argument>--include</argument>
                                        <argument>ensurepip</argument>
                                    </arguments>
                                </configuration>
                            </execution>

This seems like a duplicate of #2620 Which contains a fix

Duplicated by #2620, which we may as well allow to supersede it.

I think this is fixed at https://hg.python.org/jython/rev/d638b2c5ef28 (thanks James) and if not, please follow up in #2620.