Storage with Application Heap Process error

Been seeing this error consistantly pop up on reports. Slightly confused as to why. Would anyones input as opposed to why? Gateway is connected to the correct source just receieveing this consistant refresh error. Could it be as simple as just freeing up memeory?

{"error":{"code":"DM_GWPipeline_Gateway_MashupDataAccessError","pbi.error":{"code":"DM_GWPipeline_Gateway_MashupDataAccessError","parameters":{},"details":[{"code":"DM_ErrorDetailNameCode_UnderlyingErrorCode","detail":{"type":1,"value":"-2147467259"}},{"code":"DM_ErrorDetailNameCode_UnderlyingErrorMessage","detail":{"type":1,"value":"<ccon>ERROR [57011] [IBM][CLI Driver][DB2/LINUXPPC64LE] SQL0954C Not enough storage is available in the application heap to process the statement. SQLSTATE=57011\r\n</ccon>"}},{"code":"DM_ErrorDetailNameCode_UnderlyingHResult","detail":{"type":1,"value":"-2147467259"}},{"code":"Microsoft.Data.Mashup.ValueError.Reason","detail":{"type":1,"value":"DataSource.Error"}}],"exceptionCulprit":1}}} Table: ChangedAccounts.