Increasing the XDE import JVM heap size

You can increase the Java™ virtual machine (JVM) heap size to the maximum amount if you are running into an out-of-memory error during the XDE model import process.
Before you increase the JVM heap size, you should temporarily reduce the memory used by other parts of the Rational® modeling products by closing all editors and unnecessary projects. Then, restart the Rational modeling product and try to import your XDE model to see if the error is eliminated.
Note: The steps below assume your machine has 2 GB of memory. If your machine has less than 2 GB of memory, modify the -Xmx argument accordingly.
To increase the JVM heap size:
  1. Save all open models and close the Rational modeling product.
  2. In a text editor such as WordPad, open the rationalsdp.ini file that resides in the following default location (where x is the drive that the Rational Software Development Platform is installed to): x:\Program Files\IBM\Rational\SDP\6.0\.
  3. Add the following key to the rationalsdp.ini file: VMArgs=-Xmx1500M.
  4. Save and close the rationalsdp.ini file.
Now you are ready to start the Rational modeling product and import your XDE model or model set again. If the XDE import out-of-memory error continues to appear, try the next step: break your model into smaller models.
Related concepts
XDE model migration
Rational XDE model upgrade process

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