java exception when opening top level QSYS design

[Altera_Forum]

I am seeing this Java exception when I open my top level QSYS design.  

 Any suggestions for workarounds are appreciated because now I have  lost access to my design.  Error: An unexpected error occurred during Open System: java.lang.NullPointerException Debug: java.lang.NullPointerException  at com.altera.sopcmodel.avalon.AvalonValidator.validateTightlyCoupledPoints(AvalonValidator.java:422)  at com.altera.sopcmodel.avalon.AvalonValidator.validate(AvalonValidator.java:62)  at com.altera.sopcmodel.ensemble.EnsembleAddressValidation.connectionClassValidations(EnsembleAddressValidation.java:216)  at com.altera.sopcmodel.ensemble.Ensemble.validateSelf(Ensemble.java:1272)  at com.altera.sopcmodel.beanelement.BeanElement.validateSelf(BeanElement.java:391)  at com.altera.sopcmodel.beanelement.BeanElement.validate(BeanElement.java:362)  at com.altera.sopcdocument.ReadDocument.read(ReadDocument.java:234)  at com.altera.sopcfactories.QsysFactory$1.getObject(QsysFactory.java:119)  at com.altera.sopcmodel.util.CatalogCard.getObject(CatalogCard.java:483)  at com.altera.sopcmodel.util.CatalogCard$1.getObject(CatalogCard.java:132)  at com.altera.sopcmodel.util.CatalogCard.getObject(CatalogCard.java:483)  at com.altera.sopcmodel.util.CatalogCard$1.getObject(CatalogCard.java:132)  at com.altera.sopcmodel.util.CatalogCard.getObject(CatalogCard.java:483)  at com.altera.sopcplatform.librarian.LibrarianUtils.readEnsemble(LibrarianUtils.java:449)  at com.altera.sopceditor.util.EnsembleIO.loadEnsemble(EnsembleIO.java:163)  at com.altera.sopceditor.tools.saveandload.LoadEnsembleTask.run(LoadEnsembleTask.java:199)  at com.altera.ui.app.base.EditorTaskRunner$12.run(EditorTaskRunner.java:461)  at com.altera.ui.app.base.ThreadRunner$1.run(ThreadRunner.java:65)  at java.lang.Thread.run(Unknown Source)

[Altera_Forum]

This is with Altera Qsys 11.1sp2 Build 259

[Altera_Forum]

Same issue in Qsys 12.0 Build 178 

 Info: Reading index /home/hill/altera/12.0/quartus/sopc_builder/bin/root_components.ipx Info: /home/hill/altera/12.0/quartus/sopc_builder/bin/root_components.ipx: Loading now from components.ipx Info: Reading index /home/hill/altera/12.0/quartus/sopc_builder/bin/ip_component_categories.ipx Info: /home/hill/altera/12.0/quartus/sopc_builder/bin/ip_component_categories.ipx described 0 plugins, 0 paths, in 0.03 seconds Info: /home/hill/altera/12.0/quartus/sopc_builder/bin/ip_component_categories.ipx matched 1 files in 0.03 seconds Info: Reading index /home/hill/altera/12.0/ip/altera/altera_components.ipx Info: /home/hill/altera/12.0/ip/altera/altera_components.ipx described 585 plugins, 0 paths, in 0.36 seconds Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Info: /home/hill/altera/12.0/ip/**/* matched 1201 files in 0.60 seconds Info: /home/hill/.altera.quartus/ip/12.0/**/* matched 0 files in 0.00 seconds Info: /home/hill/nios2-rtems/hdwDesign/timedDataSys/ip/**/* matched 0 files in 0.00 seconds Info: /home/hill/nios2-rtems/hdwDesign/timedDataSys/* matched 57 files in 0.03 seconds Info: /home/hill/nios2-rtems/hdwDesign/timedDataSys/*/* matched 1364 files in 0.21 seconds Info: Reading index /home/hill/altera/12.0/quartus/sopc_builder/builtin.ipx Info: /home/hill/altera/12.0/quartus/sopc_builder/builtin.ipx described 95 plugins, 0 paths, in 0.07 seconds Info: /home/hill/altera/12.0/quartus/sopc_builder/**/* matched 10 files in 0.07 seconds Info: Reading index /home/hill/altera/12.0/quartus/common/librarian/factories/index.ipx Info: /home/hill/altera/12.0/quartus/common/librarian/factories/index.ipx described 150 plugins, 0 paths, in 0.10 seconds Info: /home/hill/altera/12.0/quartus/common/librarian/factories/**/* matched 4 files in 0.10 seconds Info: /home/hill/altera/12.0/quartus/sopc_builder/bin/$IP_IPX_PATH matched 1 files in 0.00 seconds Info: /home/hill/altera/12.0/quartus/sopc_builder/bin/root_components.ipx described 0 plugins, 9 paths, in 1.05 seconds Info: /home/hill/altera/12.0/quartus/sopc_builder/bin/root_components.ipx matched 1 files in 1.05 seconds Info: Loading presets Warning: ddr_sdram: Used altmemddr 12.0 (instead of 11.1) Warning: tse_mac: Used triple_speed_ethernet 12.0 (instead of 11.1) Warning: sgdma_tx: Used altera_avalon_sgdma 12.0 (instead of 11.1) Warning: clk: Used clock_source 12.0 (instead of 11.1) Warning: dma_csr_bridge: Used altera_avalon_mm_bridge 12.0 (instead of 11.1) Warning: sys_clk_timer: Used altera_avalon_timer 12.0 (instead of 11.1) Warning: periph_clk: Used clock_source 12.0 (instead of 11.1) Warning: mm_bridge: Used altera_avalon_mm_bridge 12.0 (instead of 11.1) Warning: sysid: Used altera_avalon_sysid_qsys 12.0 (instead of 11.1) Warning: jtag_uart_console: Used altera_avalon_jtag_uart 12.0 (instead of 11.1) Warning: periph_clk: Used clock_source 12.0 (instead of 11.1) Warning: pipeline_bridge: Used altera_avalon_mm_bridge 12.0 (instead of 11.1) Warning: tight_coupled_code_ram: Used altera_avalon_onchip_memory2 12.0 (instead of 11.1) Info: no _hw.tcl package requested, assuming package require -exact sopc 9.0 Warning: nios2: Used altera_nios2_qsys 12.0 (instead of 11.1) Warning: tsc_flash: Used altera_generic_tristate_controller 12.0 (instead of 11.1) Warning: tristate_pin_sharer: Used altera_tristate_conduit_pin_sharer 12.0 (instead of 11.1) Warning: tristate_bridge: Used altera_tristate_conduit_bridge 12.0 (instead of 11.1) Warning: altpll: Used altpll 12.0 (instead of 11.1) Warning: periph_bridge: Used altera_avalon_mm_clock_crossing_bridge 12.0 (instead of 11.1) Warning: cpu_bridge: Used altera_avalon_mm_bridge 12.0 (instead of 11.1) Warning: ddr_ref_clk: Used clock_source 12.0 (instead of 11.1) Error: An unexpected error occurred during Open System: java.lang.NullPointerException Debug: java.lang.NullPointerException  at com.altera.sopcmodel.avalon.AvalonValidator.validateTightlyCoupledPoints(AvalonValidator.java:422)  at com.altera.sopcmodel.avalon.AvalonValidator.validate(AvalonValidator.java:62)  at com.altera.sopcmodel.ensemble.EnsembleValidator.connectionClassValidations(EnsembleValidator.java:893)  at com.altera.sopcmodel.ensemble.EnsembleValidator.validate(EnsembleValidator.java:120)  at com.altera.sopcmodel.ensemble.Ensemble.validateSelf(Ensemble.java:1284)  at com.altera.sopcmodel.beanelement.BeanElement.validateSelf(BeanElement.java:392)  at com.altera.sopcmodel.beanelement.BeanElement.validate(BeanElement.java:363)  at com.altera.sopcdocument.ReadDocument.read(ReadDocument.java:235)  at com.altera.sopcfactories.QsysFactory$1.getObject(QsysFactory.java:119)  at com.altera.sopcmodel.util.CatalogCard.getObject(CatalogCard.java:481)  at com.altera.sopcmodel.util.CatalogCard$1.getObject(CatalogCard.java:131)  at com.altera.sopcmodel.util.CatalogCard.getObject(CatalogCard.java:481)  at com.altera.sopcmodel.util.CatalogCard$1.getObject(CatalogCard.java:131)  at com.altera.sopcmodel.util.CatalogCard.getObject(CatalogCard.java:481)  at com.altera.sopcplatform.librarian.LibrarianUtils.readEnsemble(LibrarianUtils.java:449)  at com.altera.sopceditor.util.EnsembleIO.loadEnsemble(EnsembleIO.java:163)  at com.altera.sopceditor.tools.saveandload.LoadEnsembleTask.run(LoadEnsembleTask.java:198)  at com.altera.ui.app.base.EditorTaskRunner$12.run(EditorTaskRunner.java:461)  at com.altera.ui.app.base.ThreadRunner$1.run(ThreadRunner.java:65)  at java.lang.Thread.run(Unknown Source)

[Altera_Forum]

FWIW, I was able to recover my top level QSYS design today. I noticed that the Java crash had something to do with validation of nios2 tightly coupled data and instruction masters when QSYS loads a design file into memory, and I also recalled that the last change I made in QSYS was related to moving the SGDMA descriptor ram between the top level system and the network subsystem (because I was unhappy with how the base address was being maintained in two places - both at the top level and at the subsystem level). I decided to try adding the on-chip SGDMA descriptor RAM back into the network subsystem to work around the QSYS crash but I couldn't remember any-longer the name of the on-chip ram master that was used in the export. Finally, after looking in the ginormous raw .qsys file I determined that the exact name of the export of the ram master, specified in the link in the top level subsystem, was "descr_ram_slave". After properly amending the export name in the network subsytem (using QSYS - I did not modifiy any QSYS files outside of QSYS) then I could open my top level design again in QSYS.

[Altera_Forum]

added an entry to the wiki at 

 http://www.alterawiki.com/wiki/new_qsys_issues#java_error

[Altera_Forum]

Thank you for the update! It's good to know. 

You should submit this bug report to Altera so that they can fix it in a later release.

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