Why am I getting a quadprog error Unexpected Standard exception from MEX file. What() is:bad allocation?

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I was solving some problems using quadprog but I observed that for larger inputs I run into the following message: error in quadprog 
Unexpected Standard exception from MEX file.
What() is:bad allocation
..
The same code is able to run on other computers, but takes an extremely long time.

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MathWorks Support Team
MathWorks Support Team 2018년 4월 3일
This error is due to a memory issue. 
Making all matrices sparse before calling quadprog reduces the computing time and also eliminates the error.
 

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