0003697: Opening huge 147 MB STEP file leads to "Not responding" - FreeCAD Tracker

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ID	Project	Category	View Status	Date Submitted	Last Update

0003697	File formats	Bug	public	2018-11-17 01:10	2019-08-14 19:30

Reporter	Dale Mahalko	Assigned To
Priority	normal	Severity	feature	Reproducibility	always
Status	closed	Resolution	fixed
Platform	Windows 10 64-bit	OS	Windows 10	OS Version	64-bit

Summary	0003697: Opening huge 147 MB STEP file leads to "Not responding"
Description	I am not a regular user of FreeCAD, I only just installed it before trying to do this and seeing this problem. I am only trying to use FreeCAD to convert a complete STEP model of the Ultimaker 3 Extended, into a mesh for use in non-CAD 3D modeling software. The problem is not that FreeCAD has crashed but that it is working so hard on reading the STEP file, that it stops responding to Windows, which to the end user may appear to be a crash or freeze. FreeCAD needs to: Be modified to display a progress bar during a long import or file-open task that takes more than a few seconds, Actively update the progress bar as the import/open task runs, optionally with a Cancel button to allow aborting of an unexpectedly long import/open task, Respond to Windows during the import so that the system doesn't display Not Responding.
Steps To Reproduce	This is all I have done with FreeCAD, so far: Install FreeCAD-0.17.13541.9948ee4-WIN-x64-installer.exe Go to https://github.com/Ultimaker/Ultimaker3Extended Click Clone or Download, then Download ZIP. Extract ZIP Inside is a folder named "3D model Ultimaker 3 extended", which contains a second "9511.STEP.zip". Extract. Open the 147 megabyte "9511.STEP" with OpenCAD After a short period an hourglass will appear, and if the Windows Task Manager is opened it says OpenCAD is Not Responding. Eventually after about 10 minutes of waiting through this with no feedback from the program, it will open with no error.
Additional Information	OS: Windows 10 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.17.13541 (Git) Build type: Release Branch: releases/FreeCAD-0-17 Hash: 9948ee4f1570df9216862a79705afb367b2c6ffb Python version: 2.7.14 Qt version: 4.8.7 Coin version: 4.0.0a OCC version: 7.2.0 Locale: English/UnitedStates (en_US)
Tags	No tags attached.

FreeCAD Information

chrisb 2018-11-17 08:51 developer ~0012203	Forum discussion

mywave82 2018-12-30 23:27 reporter ~0012348	I have committed a PR to the git repo that attempts to fix this issue (I think the progressbar in the statusbar did work at some time in the past for loading STEP files). It still has some few issues: The loader is still performed in the MainThread, and some of the calls into OCCT library are heavy: * The initial file load function does not support feedback, causing the initial pause, before anything happens at all. * Transferring of the STEP model into the internal format of OCCT the heavy task, and does give us Progress feedback, but some of the internal steps are very big at the end, still causing long pauses. * I think the OCCT library supports cancellation to be sent during the transfer, but we do not show that in the StatusBar

wmayer 2019-01-01 21:04 administrator ~0012361 Last edited: 2019-01-01 21:05	https://github.com/FreeCAD/FreeCAD/commit/06ef43c77f286f64adc1f90020d51fb3b982d29a

FreeCAD: master 06ef43c7 2018-12-30 16:57:30 Stian Skjelstad Committer: wmayer Details Diff	Fix 0003697 We need to initialize progressTime for given number of step-operations too, else the filter that checks for X ms between each refresh update will always fail, due to time-difference being way out of range. Also, 10 updates per second is not a lot, since we also filter out the QT event loop for long operations performed in the main thread.		Affected Issues 0003697
	mod - src/Gui/ProgressBar.cpp		Diff File

Date Modified	Username	Field	Change
2018-11-17 01:10	Dale Mahalko	New Issue
2018-11-17 08:51	chrisb	Note Added: 0012203
2018-11-17 08:52	chrisb	Severity	minor => feature
2018-12-30 23:27	mywave82	Note Added: 0012348
2019-01-01 21:04	wmayer	Status	new => closed
2019-01-01 21:04	wmayer	Resolution	open => fixed
2019-01-01 21:04	wmayer	Note Added: 0012361
2019-01-01 21:05	wmayer	Note Edited: 0012361
2019-08-14 19:30	Kunda1	Changeset attached	=> FreeCAD master 06ef43c7