Message SAP XT669 - Transfer error between system &1 and &2

Diagnosis
The configuration of the Transport Management System has the twosystems &V1& and &V2& in the same transport group. Thismeans that the two systems access a common transport directory.
When the system checked the transport groups, it discovered that system&V2& cannot read correctly a test file written by system&V1& to the transport directory.
System &V1& created the test file with the following contents:
&V3&
System &V2& read the following contents
&V4&

Procedure
Check the configuration of the systems &V1& and &V2&.