How to copy the XPO files out of version control...partial code working, bizarre issue - version-control

Question

I began upgrading our layers to Roll Up 7 while we still were developing in another environment with TFS turned on. We were at say version 1850, and by the time I finished, we were at 1900. So the goal is to merge in the 50 different check-ins into the completed RU7 environment. Each check-in can contain many different objects, and each object is stored in TFS as an XPO somewhere.
My code is 90% of the way there, but the issue arrises when copying the files out of the temp directory. When I look in the temp directory, the files aren't there, but somehow they're able to be accessed.
static void Job33(Args _args)
{
#File
SysVersionControlSystem sysVersionControlSystem = versioncontrol.parmSysVersionControlSystem();
SysVersionControlTmpItem contents;
SysVersionControlTmpChange change;
SysVersionControlTmpChange changes;
int i;
SysVersionControlTmpItem contentsAddition;
SysVersionControlTmpItem contentsItem;
str writePath;
Set permissionSet = new Set(Types::Class);
str fileName;
int n;
;
change = versioncontrol.getChangesHistory();
// BP deviation documented
changes.setTmp();
changes.checkRecord(false);
changes.setTmpData(change);
while select changes
order by changes.ChangeNumber asc
where changes.ChangeNumber > 1850
{
writePath = #'C:\TEMP\' + int2str(changes.ChangeNumber) + #'\';
contentsAddition = versioncontrol.getChangeNumberContents(changes.ChangeNumber);
n = 0;
while select contentsAddition
{
// HOW DOES THIS LINE ACCESS THE FILE BUT MY METHOD CAN NOT??
contentsAddition.viewFile();
//?????????????
// Write to appropriate directory
if(!WinAPI::pathExists(writePath))
WinAPI::createDirectory(writePath);
n++;
fileName = int2str(changes.ChangeNumber) + '_' + int2str(n) + '.xpo';
if (WinAPI::fileExists(contentsAddition.fileName(), false))
{
// Write to appropriate directory
if(!WinAPI::pathExists(writePath))
WinAPI::createDirectory(writePath);
WinAPI::copyFile(contentsAddition.fileName(), writePath + fileName, true);
info(strfmt("|%1|%2|", contentsAddition.fileName(), writePath + fileName));
}
}
info(strfmt("%1", changes.ChangeNumber));
}
}

Answer 1

Buried in Classes\SysVersionControlFilebasedBackEndTfs there is a .Net assembly that is used. I was able to use this to extract what I needed mixed in with the upper code. After I used this...my code from above started working strangely enough??
Somehow there was a file lock on the folder that I copied TO, that just wouldn't let me delete it until I closed AX...no big deal, but it suggests there is a tfsProxy.close() method or something I should have called.
Microsoft.Dynamics.Morphx.TeamFoundationServer.Proxy tfsProxy = new Microsoft.Dynamics.Morphx.TeamFoundationServer.Proxy();
;
tfsProxy.DownloadFile(contentsAddition.InternalFilename, changes.ChangeNumber, writePath + fileName);

Answer 2

So you are trying to just get the objects that were changed so you can import them into the new RU7 environment? Why not do this within Visual Studio directly? You can pull the XPOs from there based on the history of changesets since you started the RU7 upgrade.
Also, you should use branching for this. It would have been easy to just branch the new code in that way. Something you should look into for the future.