模型优化生成nb格式报错No attributes called beta found for swish

[hfutzhu]

模型优化生成nb格式报错：代码如下：
opt=Opt()

2. 指定输入模型地址

opt.set_model_dir("D:/projects/carplate/model-ocr/prod-ccpd/rec")

3. 指定转化类型： arm、x86、opencl、npu

opt.set_valid_places("arm")

4. 指定模型转化类型： naive_buffer、protobuf

opt.set_model_type("naive_buffer")

4. 输出模型地址

opt.set_optimize_out("D:/projects/carplate/model-ocr/prod-ccpd/rec")

5. 执行模型优化

opt.run()

报错信息
Loading topology data from E:/PP-OCR/PaddleOC-2.6.1/output/prod/rec/inference.pdmodel
Loading params data from E:/PP-OCR/PaddleOC-2.6.1/output/prod/rec/inference.pdiparams

1. Model is successfully loaded!
   [F 11/26 18:54:58.977 ...e-Lite\lite/core/model/general/op_desc.h:118 paddle::lite::general::OpDesc::GetAttr] Check failed: it != attrs().end(): No attributes called beta found for swish