Is it a laptop and do you have any external monitors plugged in? I found that I got the error message when I was remoting into the computer using screenshare without a monitor plugged in. When I had a monitor plugged in, the message wouldn't appear. ... View more

I just installed 21.0.2 and I'm having the same issue.  To reproduce: 1) start a new document. 2) create a small ellipse in the center of the document. 3) create a group and move the ellipse layer to the group. 4) move the layer mask of the ellipse shape to the group (Cmd + Shift, then click drag the layer preview image onto the group) Result: The ellipse is now masking the group which contains a fill layer, however instead of the fill layer going to the edges of the canvas, it stops at the edges of the ellipse. Side note: Why does having the path operator set to Combine Shapes "punch out" the group? I would expect Subtract Front Shape to do that, but I get the opposite expected result. Also I noticed when playing around with the Fill layer left over from the ellipse that it sometimes won't even show up when moved around the layer stack. Switching to Legacy Compositing is still a workaround. But the path operators are still behaving in the opposite manner of what one would expect. ... View more

I'm having the same issue.   Right after starting Photoshop from the Dock, the loading splash image shows, then the error pops up: "Could not complete the command because of a program error." After clicking OK Photoshop appears to finish loading and run normally. The error always appears when starting Photoshop again.   This is on a freshly installed system. No addons were installed.    System Summary: Adobe Photoshop Version: 21.0.2 20191122.r.57 2019/11/22: e3e4068e635 x64 macOS Mojave (10.14.6) 3.46 GHz 6-Core Intel Xeon (single X5690) AMD Radeon HD 7950 3GB (with custom firmware) 64GB 1333MHz DDR3 1TB Samsung 970 EVO NVMe SSD   Steps I have tried: • Rebooting  :  same error. • Resetting preferences (Cmd + Option + Shift when starting Photoshop) : same error. • Disabling "Use Graphics Processor" (Preferences > Performance > Graphics Processor Settings)  :  same error. • Uninstalling user fonts (~/Library/Fonts)  :  same error.   PSErrorLog.txt: The only entry in the log (~/⁨Library⁩/⁨Preferences⁩/⁨Adobe Photoshop 2020 Settings⁩/PSErrorLog.txt) is just repeated for every launch. 2019:12:11 14:42:19 : <NULL> : 0 : REQUIRE failed 2019:12:11 14:43:29 : <NULL> : 0 : REQUIRE failed 2019:12:11 14:44:38 : <NULL> : 0 : REQUIRE failed 2019:12:11 14:52:19 : <NULL> : 0 : REQUIRE failed 2019:12:11 14:57:04 : <NULL> : 0 : REQUIRE failed   Photoshop System Info: Adobe Photoshop Version: 21.0.2 20191122.r.57 2019/11/22: e3e4068e635 x64 Number of Launches: 5 Operating System: Mac OS 10.14.6 System architecture: Intel CPU Family:6, Model:12, Stepping:2 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2, HyperThreading Physical processor count: 6 Logical processor count: 12 Processor speed: 3460 MHz Built-in memory: 65536 MB Free memory: 42405 MB Memory available to Photoshop: 61666 MB Memory used by Photoshop: 70 % ACP.local Status: - SDK Version: 1.24.4 - Core Sync Status: Reachable and compatible - Core Sync Running: 4.3.16.14 - Min Core Sync Required: 4.3.4.2 ACPL Cache Config: - Time to Live: 5184000 seconds - Max Size: 20480 MB - Purge Percentage: 50% - Threshold Percentage: 85% - Purge Interval: 300 seconds Alias Layers: Disabled. Modifier Palette: Disabled. Highbeam: Enabled. Touch Bar Property Feedback: Enabled. Image tile size: 1024K Image cache levels: 4 Font Preview: Medium TextComposer: Latin Display: 1 Main Display Display Bounds: top=0, left=0, bottom=1440, right=2560 OpenGL Drawing: Enabled. OpenGL Allow Old GPUs: Not Detected. OpenGL Drawing Mode: Advanced OpenGL Allow Normal Mode: True. OpenGL Allow Advanced Mode: True. AIFCoreInitialized=1 AIFOGLInitialized=1 OGLContextCreated=1 NumGLGPUs=1 NumCLGPUs=1 NumNativeGPUs=1 glgpu[0].GLVersion="2.1" glgpu[0].IsIntegratedGLGPU=0 glgpu[0].GLMemoryMB=3072 glgpu[0].GLName="AMD Radeon HD 7950 OpenGL Engine" glgpu[0].GLVendor="ATI Technologies Inc." clgpu[0].CLPlatformVersion="1.2 (Aug 31 2019 04:58:52)" clgpu[0].CLDeviceVersion="1.2 " clgpu[0].IsIntegratedCLGPU=0 clgpu[0].CLMemoryMB=3072 clgpu[0].CLName="AMD Radeon HD 7950 Compute Engine" clgpu[0].CLVendor="AMD" clgpu[0].CLVendorID=16915456 clgpu[0].CLDriverVersion="1.2 (Oct 12 2019 11:07:08)" clgpu[0].CLBandwidth=1.80222e+11 clgpu[0].CLCompute=1289.52 nativegpu[0].NativeName="AMD Radeon HD 7950" UPDATE: I have discovered that using the Screen Sharing app in macOS without a monitor plugged in seems to be the cause of the problem. Once I plug in a monitor the error message does not appear when starting Photoshop.     ... View more

Basically any non zero value doesn't seem to have any effect, even extreme values. ... View more