Panasonic KX-TDA100 Pc Programming Manual page 61

2.5 Tool
If data in a field being imported does not match the required format for the import
destination, an error message will be displayed when the import operation is attempted, and
the operation will be cancelled.
This can occur when, for example, the destination field can only accept numeric data, but
the data being imported contains alphabet characters, as the correct fields were not linked
together.
PC Programming Manual 61