I am getting the following fatal error STEP 1 does not reference any NLPARM Bulk Data entry

pranayjoseph.vanukuri over 5 years ago

I am getting the following fatal error
STEP 1 does not reference any NLPARM Bulk Data entry

0 pranayjoseph.vanukuri over 5 years ago

SUBCASE 222716

STEP 1

LABEL= 22271_bolt

LOAD =   2711

ANALYSIS = NLSTATIC

NLSTEP = 1

STEP 2

LOAD = 222716

ANALYSIS = NLSTATIC

NLSTEP = 2

XXXXXXXX

BEGIN BULK

NLSTEP  1

NLSTEP  2
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0 Don.Graff over 5 years ago

Hi- just to clarify, what solution sequence and version of Nastran are you running?
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0 pranayjoseph.vanukuri over 5 years ago

MSC NASTRAN 2016
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0 pranayjoseph.vanukuri over 5 years ago

I am using SOL 400, with preload effect in step 1 and regular load in step 2.
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0 Hrishikesh Phadke over 5 years ago

Please check the input deck again.

Before SUBCASE 222716 you might have accidentally put in NLPARM=1 or ANALYSIS=STATIC
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0 Don.Graff over 5 years ago

Look at the f06 where the case control is echoed to verify no NLPARM and that NLSTEP is see correctly.
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0 pranayjoseph.vanukuri over 5 years ago

In the above i mentioned one static load case

SUBCASE 212111

LOAD = 212111

with no separate steps
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0 Don.Graff over 5 years ago

Why are you doing the additional SUBCASE above SUBCASE 222716? The default for a SUBCASE is ANALYSIS=NLSTATIC, so it is likely expecting an NLPARM or NLSTEP for that SUBCASE.

The preload effect is handled by STEP 1, followed by STEP 2...
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0 pranayjoseph.vanukuri over 5 years ago

Actually i have loads at many locations, but preload at only certain hardpoints, so where there is no preload i gave direct static load
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0 Hrishikesh Phadke over 5 years ago

Please run as below. I have added NLSTEP=1 inside your Subcase 212111 along with ANALYSIS=NLSTAT..

SUBCASE 212111

LOAD = 212111

NLSTEP=1

ANALYSIS=NLSTAT

SUBCASE 222716

STEP 1

LABEL= 22271_bolt

LOAD =   2711

ANALYSIS = NLSTATIC

NLSTEP = 1

STEP 2

LOAD = 222716

ANALYSIS = NLSTATIC

NLSTEP = 2

XXXXXXXX

BEGIN BULK

NLSTEP  1

NLSTEP  2
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