http://esotericsoftware.com/forum/Spine-Export-is-too-Long-15406
As shown in the link, I updated and exported the latest beta, and it worked out so well!
(It's gotten much faster..




And I am greedy, export with rotate' option.
then
Spine Launcher 4.0.20
Esoteric Software LLC (C) 2013-2020 | http://esotericsoftware.com
Windows 10 Pro amd64 10.0
NVIDIA Corporation, GeForce GTX 1050/PCIe/SSE2, 4.6.0 NVIDIA 456.71
Starting: Spine 4.0.54-beta Professional
Spine 4.0.54-beta Professional
Licensed to: *****, *****
Started.
OpenAL 1.1, Default audio device
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Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-2.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-3.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-4.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-5.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-6.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-7.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-8.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-9.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-10.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-11.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-12.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-13.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-14.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-15.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-16.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-17.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-18.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-19.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-20.png
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Automatic backup complete.
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WARNING: Extremely slow file system access: E:/spine/01_character/01_base_character/c41/./images
WARNING: Memory usage:
Available / max: 772.1 kB / 2.1 GB (0.0%)
Allocated / max: 2.1 GB / 2.1 GB (100.0%)
Used / allocated: 2.1 GB / 2.1 GB (100.0%)
WARNING: Memory usage:
Available / max: 2.4 MB / 2.1 GB (0.1%)
Allocated / max: 2.1 GB / 2.1 GB (100.0%)
Used / allocated: 2.1 GB / 2.1 GB (99.9%)
ERROR: Error handling error:
[error]
at s.HyN.Z(_:243)
at s.fpM._(_:595)
at s.fpM.<init>(_:428)
at s.BfP.F(_:121)
at s.xgL._(_:37)
at s.FQR._(_:76)
at s.FQR._(_:40)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.Thread.dispatchUncaughtException(Unknown Source)
WARNING: Memory usage:
Available / max: 947.8 kB / 2.1 GB (0.0%)
Allocated / max: 2.1 GB / 2.1 GB (100.0%)
Used / allocated: 2.1 GB / 2.1 GB (100.0%)
ERROR: Error handling error:
[error]
at s.HyN.Z(_:243)
at s.fpM._(_:595)
at s.fpM.<init>(_:428)
at s.BfP.F(_:121)
at s.xgL._(_:37)
at s.FQR._(_:76)
at s.FQR._(_:40)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.Thread.dispatchUncaughtException(Unknown Source)
ERROR: Error handling error:
[error]
at s.HyN.Z(_:243)
at s.fpM._(_:595)
at s.fpM.<init>(_:428)
at s.BfP.F(_:121)
at s.xgL._(_:37)
at s.FQR._(_:76)
at s.FQR._(_:40)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.Thread.dispatchUncaughtException(Unknown Source)
ERROR: An unexpected error has occurred:
[OutOfMemoryError] Java heap space
at java.util.ArrayList.<init>(Unknown Source)
at s.Kfq._(_:113)
at s.Kfq._(_:286)
at s.bOy._(_:423)
at s.TkJ._(_:116)
at s.fnk._(_:483)
at s.fnk._(_:460)
at 0x00000001006ad440.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
That's error look's like memory is not enough.Esoteric Software LLC (C) 2013-2020 | http://esotericsoftware.com
Windows 10 Pro amd64 10.0
NVIDIA Corporation, GeForce GTX 1050/PCIe/SSE2, 4.6.0 NVIDIA 456.71
Starting: Spine 4.0.54-beta Professional
Spine 4.0.54-beta Professional
Licensed to: *****, *****
Started.
OpenAL 1.1, Default audio device
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Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-2.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-3.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-4.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-5.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-6.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-7.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-8.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-9.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-10.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-11.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-12.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-13.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-14.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-15.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-16.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-17.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-18.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-19.png
Writing 2048x2048: E:\spine\01_character\01_base_character\c41\unity_export\c41-20.png
Packing...
Automatic backup complete.
Packing...
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WARNING: Extremely slow file system access: E:/spine/01_character/01_base_character/c41/./images
WARNING: Memory usage:
Available / max: 772.1 kB / 2.1 GB (0.0%)
Allocated / max: 2.1 GB / 2.1 GB (100.0%)
Used / allocated: 2.1 GB / 2.1 GB (100.0%)
WARNING: Memory usage:
Available / max: 2.4 MB / 2.1 GB (0.1%)
Allocated / max: 2.1 GB / 2.1 GB (100.0%)
Used / allocated: 2.1 GB / 2.1 GB (99.9%)
ERROR: Error handling error:
[error]
at s.HyN.Z(_:243)
at s.fpM._(_:595)
at s.fpM.<init>(_:428)
at s.BfP.F(_:121)
at s.xgL._(_:37)
at s.FQR._(_:76)
at s.FQR._(_:40)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.Thread.dispatchUncaughtException(Unknown Source)
WARNING: Memory usage:
Available / max: 947.8 kB / 2.1 GB (0.0%)
Allocated / max: 2.1 GB / 2.1 GB (100.0%)
Used / allocated: 2.1 GB / 2.1 GB (100.0%)
ERROR: Error handling error:
[error]
at s.HyN.Z(_:243)
at s.fpM._(_:595)
at s.fpM.<init>(_:428)
at s.BfP.F(_:121)
at s.xgL._(_:37)
at s.FQR._(_:76)
at s.FQR._(_:40)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.Thread.dispatchUncaughtException(Unknown Source)
ERROR: Error handling error:
[error]
at s.HyN.Z(_:243)
at s.fpM._(_:595)
at s.fpM.<init>(_:428)
at s.BfP.F(_:121)
at s.xgL._(_:37)
at s.FQR._(_:76)
at s.FQR._(_:40)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.ThreadGroup.uncaughtException(Unknown Source)
at java.lang.Thread.dispatchUncaughtException(Unknown Source)
ERROR: An unexpected error has occurred:
[OutOfMemoryError] Java heap space
at java.util.ArrayList.<init>(Unknown Source)
at s.Kfq._(_:113)
at s.Kfq._(_:286)
at s.bOy._(_:423)
at s.TkJ._(_:116)
at s.fnk._(_:483)
at s.fnk._(_:460)
at 0x00000001006ad440.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
so, can I increase memory when exporting?