My error while executing cloverETL

can you give solution
ERROR [WatchDog] - Node CLOVER_READER0 finished with status: ERROR caused by: Component pre-execute initialization failed. Source clover data file is obsolete. Data cannot be read.
ERROR [WatchDog] - Node CLOVER_READER0 error details:
Element [CLOVER_READER0:CloverDataReader]-Component pre-execute initialization failed. Source clover data file is obsolete. Data cannot be read.
at org.jetel.graph.Node.run(Node.java:418)
at java.lang.Thread.run(Unknown Source)
Caused by: Source clover data file is obsolete. Data cannot be read.
at org.jetel.data.parser.CloverDataParser.checkCompatibilityHeader(CloverDataParser.java:216)
at org.jetel.data.parser.CloverDataParser.setDataSource(CloverDataParser.java:148)
at org.jetel.component.CloverDataReader.setDataSource(CloverDataReader.java:373)
at org.jetel.component.CloverDataReader.preExecute(CloverDataReader.java:162)
at org.jetel.graph.Node.run(Node.java:416)
… 1 more
INFO [WatchDog] - [Clover] Post-execute phase finalization: 0
INFO [WatchDog] - [Clover] phase: 0 post-execute finalization successfully.
INFO [WatchDog] - Execution of phase [0] finished with error - elapsed time(sec): 1
ERROR [WatchDog] - !!! Phase finished with error - stopping graph run !!!
INFO [WatchDog] - -----------------------** Summary of Phases execution **---------------------
INFO [WatchDog] - Phase# Finished Status RunTime(sec) MemoryAllocation(KB)
INFO [WatchDog] - 0 ERROR 1 1634
INFO [WatchDog] - ------------------------------** End of Summary **---------------------------
INFO [WatchDog] - WatchDog thread finished - total execution time: 1 (sec)
INFO [main] - Freeing graph resources.
ERROR [main] - Execution of graph failed !
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Hello,
this error means, that you try to read file in clover format with different version of Clover, that was used for file creation. Clover format is binary format, so you need to write and read the data with the same version of CloverETL.