求大神指点，aspen稳态转动态，泵出现错误。且工艺中有萃取塔，该怎么转动态

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Generating block results ...

    Block: P1       Model: PUMP
      INFORMATION WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "P1"
      (MODEL: "PUMP")
      NET POSITIVE SUCTION HEAD IS LESS THAN ZERO


    Block: P2       Model: PUMP

    Block: P3       Model: PUMP

    Block: P4       Model: PUMP

    Block: P5       Model: PUMP
      INFORMATION WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "P5"
      (MODEL: "PUMP")
      NET POSITIVE SUCTION HEAD IS LESS THAN ZERO