Unexplained exception: temp file cannot be found

I have a report from a user of our app that uses embedded Derby (10.4.2.0).
The exception is attached.
It looks like a temporary file was expected to be present but could not 
be found.

As it's a report from user I can't really tell what could have caused this.
The action that led to this was a simple delete row statement.

Any ideas what could have happened?

Tim

java.io.FileNotFoundException: 
C:\Users\Csizi\Documents\IJCProjects\ijc-project\.config\localdb\db\tmp\T1242138251428.tmp
 (The system cannot find the path specified)
   at java.io.RandomAccessFile.open(Native Method)
   at java.io.RandomAccessFile.<init>(Unknown Source)
   at org.apache.derby.impl.io.DirRandomAccessFile.<init>(Unknown Source)
   at org.apache.derby.impl.io.DirRandomAccessFile4.<init>(Unknown Source)
   at org.apache.derby.impl.io.DirFile4.getRandomAccessFile(Unknown Source)
   at org.apache.derby.impl.store.raw.data.RAFContainer.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at org.apache.derby.impl.store.raw.data.RAFContainer.createContainer(Unknown 
Source)
   at org.apache.derby.impl.store.raw.data.FileContainer.createIdent(Unknown 
Source)
   at org.apache.derby.impl.store.raw.data.RAFContainer.createIdentity(Unknown 
Source)
   at org.apache.derby.impl.services.cache.ConcurrentCache.create(Unknown 
Source)
   at 
org.apache.derby.impl.store.raw.data.BaseDataFileFactory.addContainer(Unknown 
Source)
   at org.apache.derby.impl.store.raw.xact.Xact.addContainer(Unknown Source)
   at org.apache.derby.impl.store.access.heap.Heap.create(Unknown Source)
   at 
org.apache.derby.impl.store.access.heap.HeapConglomerateFactory.createConglomerate(Unknown
 Source)
   at 
org.apache.derby.impl.store.access.RAMTransaction.createConglomerate(Unknown 
Source)
   at org.apache.derby.impl.sql.execute.TemporaryRowHolderImpl.insert(Unknown 
Source)
   at 
org.apache.derby.impl.sql.execute.DeleteResultSet.collectAffectedRows(Unknown 
Source)
   at 
org.apache.derby.impl.sql.execute.DeleteCascadeResultSet.collectAffectedRows(Unknown
 Source)
   at org.apache.derby.impl.sql.execute.DeleteCascadeResultSet.open(Unknown 
Source)
   at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
Caused: java.sql.SQLException: Java exception: 
'C:\Users\Csizi\Documents\IJCProjects\ijc-project\.config\localdb\db\tmp\T1242138251428.tmp
 (The system cannot find the path specified): java.io.FileNotFoundException'.
   at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown 
Source)
   at 
org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
 Source)
   at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown 
Source)
   at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
   at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
   at 
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown 
Source)
Caused: java.sql.SQLException: Exception during creation of file 
C:\Users\Csizi\Documents\IJCProjects\ijc-project\.config\localdb\db\tmp\T1242138251428.tmp
 for container
   at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown 
Source)
   at 
org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
 Source)
Caused: java.sql.SQLException: Exception during creation of file 
C:\Users\Csizi\Documents\IJCProjects\ijc-project\.config\localdb\db\tmp\T1242138251428.tmp
 for container
   at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown 
Source)
   at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
   at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
   at 
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown 
Source)
   at 
org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown 
Source)
   at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
   at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
   at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
   at 
org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(Unknown 
Source)
   at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(Unknown 
Source)
   at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
   at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
   at 
org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:773)
   at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:566)
Caused: org.springframework.jdbc.UncategorizedSQLException: 
PreparedStatementCallback; uncategorized SQLException for SQL [DELETE FROM 
IJC_SCHEMA WHERE SCHEMA_ID = ? AND PARENT_ID = ? AND ITEM_ID = ?]; SQL state 
[XSDF1]; error code [20000]; Exception during creation of file 
C:\Users\Csizi\Documents\IJCProjects\ijc-project\.config\localdb\db\tmp\T1242138251428.tmp
 for container; nested exception is java.sql.SQLException: Exception during 
creation of file 
C:\Users\Csizi\Documents\IJCProjects\ijc-project\.config\localdb\db\tmp\T1242138251428.tmp
 for container
   at 
org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.translate(SQLStateSQLExceptionTranslator.java:121)
   at 
org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.translate(SQLErrorCodeSQLExceptionTranslator.java:322)
   at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:582)
   at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:767)
   at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:825)
   at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:829)