We have a scheduled job which imports some data from EPiServer 6 R2 to our EPiServer commerce solution which is using EPiServer v 7.19.1 and Commerce v 8.6.1

Actual job works as it should and we are getting all the data out. But during the job the log get spammed with following warnings:

2015-07-09 11:18:08,441 WARN [134] ?.? - 10.5.2 Export/import warning: Unexpected format of PropertyContentReference: 1073741917__CatalogContent
2015-07-09 11:18:08,461 WARN [134] ?.? - 10.5.2 Export/import warning: Unexpected format of PropertyContentReference: 1073741917__CatalogContent
2015-07-09 11:18:08,480 WARN [134] ?.? - 10.5.2 Export/import warning: Unexpected format of PropertyContentReference: 1073741917__CatalogContent
2015-07-09 11:18:08,483 WARN [134] ?.? - 10.5.2 Export/import warning: Unexpected format of PropertyContentReference: 1073741917__CatalogContent
2015-07-09 11:18:08,495 WARN [134] ?.? - 10.5.2 Export/import warning: Unexpected format of PropertyContentReference: 1073741917__CatalogContent
2015-07-09 11:18:08,498 WARN [134] ?.? - 10.5.2 Export/import warning: Unexpected format of PropertyContentReference: 1073741917__CatalogContent

My first solution was to ignore the warnings in episerver config, but then I noticed that there are questionmarks in the place where the Type and Method should be, so I can't ignore the warning based on those. I don't know whether these warnings are coming from EPiServer.Global namespace or somewhere else, but something weird is happening when those messages are being loggeed.

There are three questions related to this issue:

• What is causing type and method to be questionmarks?
• What is the actual warning that is causing this logging? I don't know from which row this message is exactly originated. All I know it's related to the the catalog node where we are importing data.
• How to get rid of this warning? By fixing or ignoring it

Any help is appreciated.