[MSC Nastran] no data in .op2 file.

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hello. I'm writing because I have a problem with the .op2 file.

When performing mode analysis using sol103, the .f06 file and .op2 file are created without any problems, and all data are included. File size is also more than 300 kilobytes.

However, in the case of sol145, the .f06 file contains all the flutter analysis data such as reduction frequency, damping, speed, real number, and imaginary number without fatal errors, but in the case of the .op2 file, there seems to be no data. maybe?

When .op2 is read with the read_op2 command through pynastran, sol103's .op2 file outputs analysis data such as eigenvalues, but sol145's .op2 does not. The size of the .op2 file is no more than 40 kilobytes.

How can i print .op2 File with Data of sol145?

Below is the Error in Python with read_op2 message.
No results.
no OP2 results were found.


Below is the CaseControlDeck and PARAM I used.
$CASE CONTROL DECK
SUBCASE 1
AESYMXY = ASYMMETRIC
AESYMXZ = SYMMETRIC
ANALYSIS = FLUTTER
DISPLACEMENT(SORT1,REAL) = ALL
ECHO = BOTH
FMETHOD = 1
METHOD = 5
SPC = 50
SPCFORCES(SORT1, REAL) = ALL
SUBTITLE = Default
BEGIN BULK
$PARAMS
PARAM Aunit 1.
PARAM POST -1
PARAM PRTMAXIM YES
PARAM SNORM 20.
PARAM WTMASS 1.