The mapping is potentially unsafe and cannot be imported.

So, you got this error while trying to import your mapping to Powercenter:

The mapping m_your_mapping is potentially unsafe and cannot be imported.

What is wrong and how can it be fixed? What's the root cause? Hard to tell - the error message does not explain a lot.

The Cause
Most likely the XML file has been altered outside Powercenter. It's quite common to export and to some edits in XML before importing. Some renaming, replacing some paths or parameters. However some transformations or mappings have this

CRCVALUE="123123123"

property. If the XML file has been altered, it's very much possible the CRC is no longer correct.

The Solution
While importing the XML try to use the "-s" option. It can't be found in the Informatica Command Reference (at least in all versions I've tried) but it seems to work. Instead of the usual command:

pmrep objectimport -i /pathtoyourxmlfile/m_your_mapping.xml -c controlFile.txt - l output.log

try using

pmrep objectimport -s -i /pathtoyourxmlfile/m_your_mapping.xml -c controlFile.txt - l output.log

Remarks
This worked in my case. And I have no idea what the "-s" stands for and what actually happens here...