Error #720

Altair Forum User

 There were 3 error messages during input processing.

  The first message is repeated below:

 

  *** ERROR # 720 ***

  Invalid static SUBCASE that has no load or enforced displacement.

      subcase id = 1

 

 

************************************************************************

 

 ==== End of solver screen output ==== 

 

This error appears when I add a secondary force or constraint onto multiple sections of my model. Any help is appreciated.

 

 

Altair Forum User

HI luongo1,

 

Make sure when you add new loads, constraints are under right load collectors.

 

For instance, you cannot have constraints in Force load collector and the same is used in loadstep for load.

Altair Forum User

I think the problem is that i'm using basic FEA and hyperworks keeps creating it's own load collectors and referencing those collectors. This happens when I make a load step in basic FEA. If i right click them on card edit, it'll say 'No card assigned to the entity for the current user profile'.

Altair Forum User

Hi,

 

Load collectors for spc and force doesn't require a card image.

 

if possible, please share the model.

Altair Forum User

I have shared the model with you on your drop box

Altair Forum User

Hi,

 

I didn't receive any model in my dropbox.

 

Please use the below link to share: https://ftin.india.altair.com:8443/filedrop/~BDR1DN?_ga=1.141452977.26683431.1427861035

Altair Forum User

Hi,

 

I have got your model.

 

You have four loadsteps. Each loadstep either has an SPC or FORCE.

 

This is not the right way. You need a force and SPC on one loadstep. Please make these changes and re-run the analysis.

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

hey, i have the same error and can´t fix it.

my model is below.

thanks

Unable to find an attachment - read this blog

Rahul Rajan_21763

https://community.altair.com/community?id=community_question&sys_id=08a6847a1b2bd0908017dc61ec4bcb99

 

Jack Wang

I also encountered this problem and it turned out that I just forgot to tick the "active" and "Export" boxes in the "Entity State" tab.

So it is worthy giving a check.

Augusto_Castanheira

I have a similar problem.I was trying to create two load collectors to diferent forces using the load collectors of constraint and a loadadd with all forces.But,for some reason,I have obtained this error.So,wath i did,and recommend you try is open the .fem arquive with the block note and check in the subcase part if the load is defined(probabily not) and to correct this add a text with the load manually as in the attached picture definig the id of the load.