Error in names(newLabels) = levels(pbmc) : 找不到对象'newLabels'

问题遇到的现象和发生背景

R语言：Error in names(newLabels) = levels(pbmc) : 找不到对象'newLabels'

问题相关代码，请勿粘贴截图

#cluster注释后的可视化
newLabels=singler$labels
names(newLabels)=levels(pbmc)
pbmc=RenameIdents(pbmc, newLabels)
pdf(file="04.TSNE.pdf",width=6.5,height=6)
TSNEPlot(object = pbmc, pt.size = 2, label = TRUE) #TSNE可视化
dev.off()

运行结果及报错内容

names(newLabels)=levels(pbmc)
Error in names(newLabels) = levels(pbmc) : 找不到对象'newLabels'
pbmc=RenameIdents(pbmc, newLabels)
Error in value[3L] : 找不到对象'newLabels'
此外: Warning message:
In value[3L] : 重新评估被中断的许诺
pdf(file="04.TSNE.pdf",width=6.5,height=6)
TSNEPlot(object = pbmc, pt.size = 2, label = TRUE) #TSNE可视化
dev.off()
null device