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[求助] 各位大神，这是什么情况？求解释！

<< Run reinitialized 20:18:29 Wed Mar 6, 2013>>

->Processing input specifications ...

  Flowsheet Analysis :

Block $OLVER01 (Method: WEGSTEIN) has been defined to converge
      streams: RECYCLE

COMPUTATION ORDER FOR THE FLOWSHEET:
$OLVER01 REACTOR C-1 COOLER SEP
(RETURN $OLVER01)

->Calculations begin ...

> Beginning Convergence Loop $OLVER01 Method: WEGSTEIN

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3082D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 1
4 vars not converged, Max Err/Tol 0.10000E+07

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3680D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 2
5 vars not converged, Max Err/Tol  -0.41801E+04

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3710D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 3
5 vars not converged, Max Err/Tol  -0.80516E+03

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3708D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 4
3 vars not converged, Max Err/Tol 0.80754E+02

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3709D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 5
4 vars not converged, Max Err/Tol 0.36626E+01

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3709D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 6
1 vars not converged, Max Err/Tol  -0.20024E+01

Block: REACTOR  Model: RSTOIC

Calculator Block C-1

Block: COOLER Model: HEATER
  *** SEVERE ERROR
   SPECIFIED PRESSURE DROP (-1.3709D+05) WOULD RESULT IN A PRESSURE LESS
   THAN  0.0 . PRESSURE DROP IGNORED. STREAM PRESSURE (1.0000D+05) USED.
   PROBLEM OCCURRED WHILE FLASHING OUTLET STREAM.

Block: SEP    Model: FLASH2

> Loop $OLVER01 Method: WEGSTEIN    Iteration 7
# Converged             Max Err/Tol 0.26929E+00

->Simulation calculations completed ...

  ***  No Warnings were issued during Input Translation ***

            ***  Summary of Simulation Errors  ***

               Physical
               Property       System       Simulation
  Terminal Errors    0             0             0
Severe Errors    0             0             7
         Errors    0             0             0
      Warnings    0             0             0

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