These files are being created in the same folder as the .prt files. These have the same name as the .prt files.
We have no idea how these files are being created. No i havent tried opening them in a text editor, will give that a try.
The only thing that comes to mind would be recent updates to the GM Tool Kit, other than that we ahve no idea how or why these files are being created.
Ok took a look t one of these ixf files and here are the results.
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE ixfInfo [
<!-- XML DTD defined by Unigraphics Solutions
Date Name Description of Change
3/29/2002 Shreyas Shah Version: 1.1 Date
31-Jul-2002 larson added element to source control
31-Jul-2002 larson merge from aie_v8.1
05-Feb-2003 chengc Adds "Version" attribute to ixfInfo element
06-Mar-2003 larson changed compinfo on element
04-Nov-2005 aputhenp Added attribute and element definitions added by the velocity project
17-Nov-2005 gejwang Remove the line after Date in the hostory to prevent parser failure
10-Apr-2006 aputhenp Updated dtd to support releasestatus and description in ixf - PR5425633
$HISTORY$
-->
<!-- Entity Declaration -->
<!-- Specific names and locations of external entities -->
<!-- merge-in the external entities -->
<!-- define internal entities -->
<!-- Common Elements -->
<!-- Absolute path/file name of the application file described by this X file -->
<!ELEMENT FileSpec (#PCDATA)>
<!ATTLIST FileSpec Time CDATA #IMPLIED>
<!ELEMENT Attribute (Title, Desc?, Default?, Value+) >
<!ATTLIST Attribute master (pdm | appln | both) "both"
attrmod (yes | no) "no"
reqd (yes | no) "no"
write_once (yes | no) "no"
read_only (yes | no) "no"
invisible (yes | no) "no"
data_type (int | char | string | double | logical | date) "string"
ignore_master (yes | no) "no" >
<!ELEMENT Title (#PCDATA)>
<!ELEMENT Desc (#PCDATA)>
<!ELEMENT Default (#PCDATA)>
<!ELEMENT Value (#PCDATA)>
<!-- main structure ixfinfo.type include version number -->
<!ELEMENT ixfInfo (Header?, FileInfo+)>
<!ATTLIST ixfInfo Version CDATA #IMPLIED>
<!-- The header element is needed only when xfile is generated for export.
It is not needed for import. -->
<!ELEMENT Header (ConnectionID?, StdLib?)>
<!ELEMENT ConnectionID (#PCDATA)>
<!ELEMENT StdLib (#PCDATA)>
<!ELEMENT FileInfo (FileSpec, CheckedOutInConnection?, Context, ImanInfo?, ImportInfo?, Components?, Relations?, StdAttribs?, CustomData?)>
<!ATTLIST FileInfo Partial (yes | no ) #IMPLIED>
<!ATTLIST FileInfo modified (yes | no) "no">
<!ELEMENT CheckedOutInConnection (#PCDATA)>
<!ATTLIST CheckedOutInConnection User CDATA #IMPLIED
Time CDATA #IMPLIED
Implicit (yes | no) #IMPLIED>
<!-- The name is dataset type. Type is xrelation name -->
<!ELEMENT Context (Name)>
<!ATTLIST Context type CDATA #REQUIRED>
<!ELEMENT Name (#PCDATA)>
<!ELEMENT ImanInfo (ItemType?, ItemID?, ItemName?, ItemDesc?, RevID?, ItemRevDesc?, ItemRevReleaseStatusList?, Version?, DSName?, DSDesc?, DSReleaseStatusList?, UnitOfMeasure?)>
<!ELEMENT ItemType (#PCDATA)>
<!ELEMENT ItemID (#PCDATA)>
<!ELEMENT ItemName (#PCDATA)>
<!ELEMENT ItemDesc (#PCDATA)>
<!ELEMENT RevID (#PCDATA)>
<!ATTLIST RevID NewerRevAvail (yes | no) #IMPLIED>
<!ELEMENT ItemRevDesc (#PCDATA)>
<!ELEMENT ItemRevReleaseStatusList (ReleaseStatus+)>
<!ELEMENT Version (#PCDATA)>
<!ATTLIST Version NewerVersionAvail (yes | no) #IMPLIED>
<!ELEMENT DSName (#PCDATA)>
<!ELEMENT DSDesc (#PCDATA)>
<!ELEMENT DSReleaseStatusList (ReleaseStatus+)>
<!ELEMENT UnitOfMeasure (#PCDATA)>
<!ELEMENT ReleaseStatus (#PCDATA)>
<!ELEMENT ImportInfo (RetainCheckout?, ImportConflictAction?, ImportItemType?, ImportItemID?, ImportItemName?, ImportItemDesc?, ImportRevID?, ImportItemRevDesc?, ImportDSName?, ImportDSDesc?, ImportUnitOfMeasure?)>
<!ELEMENT RetainCheckout (#PCDATA)>
<!ELEMENT ImportConflictAction (#PCDATA)>
<!ELEMENT ImportItemType (#PCDATA)>
<!ELEMENT ImportItemID (#PCDATA)>
<!ATTLIST ImportItemID Use ( AutoGenerate | AutoTranslate | Value ) "Value" >
<!ELEMENT ImportItemName (#PCDATA)>
<!ELEMENT ImportItemDesc (#PCDATA)>
<!ELEMENT ImportRevID (#PCDATA)>
<!ATTLIST ImportRevID Use ( AutoGenerate | AutoTranslate | Value) "Value" >
<!ELEMENT ImportItemRevDesc (#PCDATA)>
<!ELEMENT ImportDSName (#PCDATA)>
<!ELEMENT ImportDSDesc (#PCDATA)>
<!ELEMENT ImportUnitOfMeasure (#PCDATA)>
<!ELEMENT Components (Component+)>
<!ATTLIST Components ComponentsMod ( no | yes) "no"
ComponentsRevRule CDATA #IMPLIED
ComponentsVariantRule CDATA #IMPLIED >
<!-- The Attribute element is for occurence notes only. The element "Component" can be
replaced by any other named element with similar definition -->
<!ELEMENT Component (FileSpec?, StdLib?, CompInfo*, Attribute*)>
<!ATTLIST Component modified (yes | no) "no"
exported (yes | no) #IMPLIED >
<!ELEMENT CompInfo (Quantity?, Sequence?, Xform?, OccName?, OccId?, ObjectID?) >
<!ATTLIST CompInfo configure_out (yes | no) #IMPLIED>
<!ELEMENT Quantity (#PCDATA)>
<!ELEMENT Sequence (#PCDATA)>
<!ELEMENT Xform (#PCDATA)>
<!ELEMENT OccName (#PCDATA)>
<!ELEMENT OccId (#PCDATA)>
<!ELEMENT ObjectID (#PCDATA)>
<!ELEMENT Relations (Relation+)>
<!ATTLIST Relations RelationsMod ( yes | no) "no">
<!-- The element "Relation" should be xrelation name -->
<!ELEMENT Relation (FileSpec?, StdLib?, Attribute*)>
<!ATTLIST Relation modified (yes | no) "no"
RelationName CDATA #REQUIRED>
<!ELEMENT BaseAttribs (Attribute+)>
<!ATTLIST BaseAttribs modified (yes | no ) "no" >
<!ELEMENT StdAttribs (Attribute+)>
<!ATTLIST StdAttribs modified (yes | no ) "no">
<!ELEMENT CustomData (Data*, Custom*)>
<!ATTLIST CustomData modified (yes | no ) "no"
type CDATA #REQUIRED >
<!ELEMENT Data (Title, Data*, Custom*)>
<!ELEMENT Custom (Title, Value)>
]>
<ixfInfo>
<FileInfo modified="no">
<FileSpec>K:\Group\Engineering\TCF\Design\GM\70132_DHam Tool Tray Study\RR Tray\Ref\bracket_01.prt</FileSpec>
<Context type="UGPART">
<Name>UGMASTER</Name>
</Context>
<ImportInfo>
<RetainCheckout>yes</RetainCheckout>
<ImportConflictAction>NoImport</ImportConflictAction>
<ImportItemType>CORP_Tool</ImportItemType>
<ImportItemID>MA647882L</ImportItemID>
<ImportItemName>BRACKET</ImportItemName>
<ImportItemDesc>MA647882L</ImportItemDesc>
<ImportRevID>001</ImportRevID>
<ImportDSName/>
<ImportUnitOfMeasure/>
</ImportInfo>
</FileInfo>
</ixfInfo>