This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hello, Please temporarily move your .unidata directory out of the way. For example, since you are running the IDV on Linux: mv ~/.unidata ~/.unidata.bak Now start the IDV. What happens? Best, Unidata IDV Support > Hi, > > I couldn't start my idv. I got a message when I was running runIDV (see > below). > > Exception in thread "main" java.lang.OutOfMemoryError: Java heap space > at java.util.Arrays.copyOf(Arrays.java:3332) > at > java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137) > at > java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121) > at > java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:622) > at java.lang.StringBuilder.append(StringBuilder.java:202) > at > java.util.AbstractCollection.toString(AbstractCollection.java:465) > at java.lang.String.valueOf(String.java:2982) > at java.lang.StringBuilder.append(StringBuilder.java:131) > at > ucar.unidata.idv.IdvCommandLinePrefs.main(IdvCommandLinePrefs.java:76) > IDV failed to start. Please contact address@hidden > > This error happened after I restarted idv 4 times. I tried to used java web > start, but error is still the same. Even thought I re-installed java, it > didn't solve problem. > > My idv version is 5.3 64bit. Operating system is CentOS 7. RAM is 8G. > > Thanks for your help. > > Ticket Details =================== Ticket ID: ZVB-110157 Department: Support IDV Priority: Normal Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.