ORA-39157: error appending extension to file "string"

ORA-39157
ORA-39157: error appending extension to file "string"
Cause: Export or Import was unable to append the default extension to create the
file name. The given file name could be too long or contain illegal characters.
Subsequent messages will detail the problems.
Action: Fix the problems outlined in the secondary messages.
More details : Viste http://www.high-oracle/ora-39157/
More details : Viste http://www.high-oracle/ora-39157/
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